My Little Sister Is the Best F*p Material - Volume 9 Chapter 06: My Sister Is the Best Lover

Volume 9 Chapter 06: My Sister Is the Best Lover

Since summer break, the bathroom has been a place for Miyu and me to bond, a trigger for our closeness, and a memory-filled space. As lovers, it’s become a sanctuary for casual naked intimacy.

But as we enjoyed our bath, our parents returned. Miyu, who’d stood to let me lick her, crouched back into the water, dripping from her tied-up hair’s loose strands, eyes fixed on the door beyond. We were in deep trouble.

“Didn’t expect them back this soon…”

The sound of shopping bags being set down at the entrance faded, but their voices grew closer. They’d noticed the bathroom light, and footsteps approached.

“What do we do, Onii-chan?”

Fresh off multiple creampies, Miyu’s expression was still dreamy. I had to take charge—as her brother, it’s on me to handle our parents.

“We’ll just have to face it head-on.”

A shadow appeared on the frosted glass door. No way to hide now.

“…Someone in there?” Mom’s voice. Easier to explain to her, I thought.

“Must be Miyu. Her skirt’s here,” Dad added, spotting her clothes on the washing machine. I couldn’t let her deal with this, so I’d say she bathed earlier and is in her room.

“You guys are back early,” I called out.

“Oh, Kou-chan’s in there?” Mom replied.

“Thought it was Miyu,” Dad said.

They wouldn’t check if it’s just me.

“Yeah, Miyu’s…”

I planned to say she’s not here. That moment, it seemed best.

But I hesitated.

To sneak to our rooms, we’d need our parents in the living room with the door closed, then slip upstairs when they’re not looking. It’s doable with caution, hiding Miyu’s presence.

“Miyu’s in here with me.”

Hiding our relationship any longer felt wrong. Living under the same roof, sneaking around would turn our thrill into guilt. The timing wasn’t ideal, but my gut said this was the moment to show our bond.

“What!? Miyu!?” Dad’s voice cracked with panic.

Mom, knowing our situation, might’ve suspected when Dad mentioned the skirt. Miyu, beaming happily—not her lustful daze—reached for the door, opening it just enough to see them.

“Hey~” She waved with a bright smile.

Dad froze, forcing a strained grin. No big scene followed; Mom led him to the living room without a word.

“We did it,” I said.

“Yup,” Miyu replied.

It was bound to happen. Since our loud sex echoed through the house, this was inevitable. No way we could fool around now, so we quietly got out, dressed in our rooms, and parted ways.

Miyu, exhausted from intense sex, was probably sleeping. I had to face our parents.

(I can do this. If I back out now, I’ll feel guilty with everyone I meet. I’ve decided to move forward, so I’ve gotta push through.)

My steps were heavy. Each stair tempted me to retreat and pretend it didn’t happen. But I forced my rooted feet forward to the living room.

Taking a deep breath, I organized my thoughts and opened the door.

“Welcome back, Mom, Dad.”

Only Mom looked at me. Dad, my real target, was about to open a beer can. Mom, sensing my intent, signaled with her eyes and left for the bedroom. Standing beside Dad, who sat sipping beer, I started.

“Hey, Dad, can you pause the drinking and talk?”

He didn’t meet my eyes. The can hissed as he poured.

“I need to talk…”

“I heard you. Let me drink,” he said, watching the foam settle.

“I’d rather talk before you’re drunk.”

“One glass won’t hurt. But I need it to hear this.”

He’d seen us in the bath and remembered us coming back cozy from Yamamoto-san’s place. He knew what I was about to say, his tone calm, not angry.

Gulping half the glass, he sighed heavily, motioning me to sit. No choice but to admit our relationship’s exposed.

“How much do you know about Miyu?” I asked, sitting beside him.

“Know what?”

“About her struggles as a kid. Getting scolded for wearing frilly clothes to school, fighting with boys, worrying she could only love girls or siblings.”

“Yeah, that stuff.”

He downed the rest, grabbing a second can he’d prepared. I took it, pouring as he said, “Sorry.”

“She only loves me, it seems.”

He stayed silent.

“It’s mental, so I don’t know why. But she can only love someone close, like a girl or sibling.”

Her conclusion, built from experiences with me and Yamamoto-san, feels undeniable.

Finishing the pour, I set the empty can down. He didn’t drink right away.

“Phew,” another sigh, then a sip.

“Why not me?” he said, a shocking comment, maybe to lighten the mood.

“Maybe ‘cause I’ve got Mom’s blood too. We took care of her growing up.”

“True.”

He nodded, showing no anger.

“Tell me your side.”

I’d only stated facts. He wanted what came next.

“I’ve decided to spend my life with Miyu. She wants that too. I’ll never be with anyone else.”

“How do you prove that?”

He finally looked at me, testing me. I was ready.

“Remember the tutor I mentioned?”

“The one with… huge boobs?”

“Yeah, her.”

Ignoring his slight misrecall, I showed him Yamamoto-san’s photo. He leaned forward, eyes wide.

“I turned down her serious confession, even after getting close.”

“Wait, you… with her? Like, that close?”

“Yeah, multiple times. She was intense.”

He sweated. To others, Yamamoto-san’s a top-tier beauty, her allure undeniable even in a photo.

“You expect me to believe that?”

Even if he buys my commitment to Miyu, he needs proof it’s not a lie.

“I’ve got evidence.”

I’d planned ahead, asking Yamamoto-san for a video call to confirm if doubted.

“Hey, you actually called! Can I talk?” Her radiant face appeared, making Dad lean in again. A video leaves no room for fakes.

“Uh, hi, I’m the dad,” he stammered, bowing nervously. Like a virgin.

“So, you and my son were… close?”

“Yes, every word is true. We’re still close, and I love him,” she said, winking at me. Overdoing it a bit.

“You didn’t pay her to say this, right?”

“No way. A girl this cute wouldn’t say she loves a guy like me for money.”

“Fair, but…”

He struggled to accept I’d been intimate with such a beauty.

“Well, for Sotomichi-kun’s dad, I don’t mind proving it…” Yamamoto-san propped her phone, starting to strip to her underwear.

“Wait, Yamamoto-san! I didn’t ask for that!” I yelled.

“W-Wait, young lady, you shouldn’t…” Dad protested, eyes glued to the screen. No one beats Yamamoto-san at stirring male instincts.

“Convinced yet?” she teased.

“I believe you! Put your clothes on, we’re done!” Dad said.

“It was short but fun! Bye!” The call ended.

“Why not her!?”

“It’s complicated.”

I had my doubts, but choosing Miyu led to this. I explained, and Dad accepted my commitment.

“I know you’ve got thoughts about us being siblings…”

“She’s smiling so much now. Her happiness shows. I won’t deny it.”

“So…!”

His approval made me lean forward.

“But there’s a condition for accepting your relationship.”

Dad held up a finger to hush me, pointing to the fridge. I understood he wanted another beer before continuing. I dashed to the kitchen, grabbed a can, and returned.

“What’s the condition?” I asked.

“Kids. Yours and Miyu’s.”

He dove right in. For siblings living as a couple, it’s a topic we can’t avoid.

“At least one grandchild. It has to be yours and Miyu’s. No deadline, but I want to talk to my grandkid before I’m senile. That’s the condition.”

A shocking demand from a parent. Miyu and I already planned for kids, so it’s not a huge hurdle.

“With Miyu’s personality, I wasn’t sure she’d ever marry. It’s not an era where you have kids for the family line. If she married elsewhere, I’d have given up on her kids, considering her in-laws.”

Dad downed the rest of his glass. He wasn’t drunk or speaking impulsively—this was serious.

“But with you, it’s different. There’s a chance to see Miyu’s kids. No matter what people say, or what Mom thinks, I won’t budge on this.”

Forcing a daughter to have kids is outdated, and for Miyu, it must’ve been a tough call for him.

“No worries there. We’ll show you a grandkid soon enough. We’re excited if you are.”

“Good. Do what you want.”

He poured the third can boldly, gulping it with foam. Our free-spirited parents accepting us wasn’t too surprising.

“Alright, plenty of night left! Mom! Get lots of meat for dinner! We’re feasting!” Dad stood, shouting toward the bedroom.

“Geez, you’re too drunk to shop now,” Mom replied.

“Send Miyu and him. They’re close. Join us for a drink, Mom!”

“Making the celebrants shop? Really?”

“Don’t sweat the details. How about we join in tonight, huh?” Dad teased.

“Stop it, not in front of our son…”

Yeah, quit flirting in front of me. I get you’re happy, but still.

“Onii-chan? Is Dad done talking?” Miyu called, descending the stairs, drawn by the noise. The whole family gathered before dinner.

“Miyu! You two can bathe together openly now!” Dad boomed.

“Really? I can be lovey with Onii-chan?”

“Bathtime with Dad too?”

“Hard pass, even if I die.”

Her sharp retort sobered Dad up, his sweat cooling. Classic Miyu, merciless even to family.

From that day, Miyu and I became an officially recognized couple. Our routine didn’t change: eat, bathe, prep for tomorrow, then sex in my room. A blend of family and lover life continued.

“It went well, huh, Onii-chan… nn…” That night, in her curve-hugging pajamas, Miyu hugged me, kissing to release pent-up lust from the interrupted bath. Though our lifestyle stayed the same, parental approval brought mental stability, vital for good sex. For Miyu, the thrill of sibling sex without guilt was paramount.

“Miyu… your kisses feel so good…”

Tongues entwined, I sucked hers, licking her mouth. Her being my sister fuels my arousal. Even after falling in love, we avoided kissing during sex until recently. Kissing my sister excites me; these forceful kisses are for my lust, not love—basically masturbation.

“Nn… nfu… nnh… haa… Onii-chan… nn…” Miyu’s thrilled kissing her brother, aroused by being used for my pleasure. It might feel better to her than affectionate kisses.

“Haa… nmu… chu… haa… nnh… it’s so hot here…” She pulled off my pants, stroking my erection. Her initiating touch is rare.

But her hand only grazed the skin, not stroking. She knows this kissing is my masturbation, waiting for my lead. Still, she undressed me because her own lust was peaking, touching my arousal to sate herself slightly.

“Fnn… muchu… fa… haa… Onii-chan… nn, ju… puha… ah… nnh…” Each kiss drained her strength, her tongue stretched desperately, begging me to savor kissing my sister. She couldn’t hold back—love juices dripped from her thighs. Planning sex in the bath, she’d gone panty-less under her pajamas.

“Haa, haa… Onii-chan… I want your cum…” She stroked my balls, begging. No more teasing—she’d suffer. I shed my pants fully, directing her to kneel before my erect cock.

“Wait there.”

She knelt obediently, juices soaking her pajama hems. Like our first time, I stroked myself, her waiting to catch my cum. But unlike then, she now wets her pajamas and begs for my load.

Her once-glaring eyes now sparkled, eager for my cum. As I stroked, love flowed between us.

“I love you, Onii-chan,” she said, gazing up with a lovestruck face.

“Miyu… I love you too… I’ll love you forever…!” Words meant for sex, but our sibling bond connected us enough without physical union.

“Miyu… I’m cumming…! I’ll shoot as much as I can… open your mouth and drink it all…!”

“Haa, haa… doesn’t matter how many times… give me all your cum… nn…!”

Dopyu, dopyu, byururu, byukubyuku, byubyu, byururu, byu, doku, dokun—!!

Thick, white arcs shot into her mouth repeatedly. Cumming from her watching, aroused by her swallowing, her erotic joy at collecting my load pushed me to cum again. Each burst sent unmatched pleasure through me, like a drug only this moment could produce.

All my cum poured into her mouth. She swirled it, savoring the taste, swallowing with a satisfied look.

“Thanks for drinking it, Miyu. Felt amazing.”

“Thank you for the meal, Onii-chan… Delicious.”

Her loose cheeks lifted in a beaming smile. I thought creampies thrilled her most, but she was at her peak now. Her sibling-sex-driven lust clearly surpassed her biological urges.

“You’re satisfied, right?” she said, standing shakily.

“I’m so horny I might lose it, so I’ll take care of it next door.”

After helping me, it was her turn.

My lust was calm, but my love for her—a tight, aching feeling—remained. Maybe love is part of lust. Unable to resist, I hugged her.

“Sorry, Miyu. I know you want to masturbate, but let me hold you a bit longer.”

Pure selfishness—I didn’t care about her plans. I just needed to hold her.

“Nn… nnh… Onii… ah… don’t hug so tight now… haa… ah…” Her sultry moans sounded like I was taking her from behind, yet we were clothed, me not even hard.

“Miyu, I love you too much to let go yet.”

“Fa, nn… no… don’t talk near my ear… ah, nn, nnh…!” My voice made her tremble. Even my breath on her ear drew moans. She arched her hips, instinctively clenching her vagina to manage the pleasure, her soaking silk panties revealing her arousal.

“Haa, haa… aaah…! Onii-chan… Onii-chan…!” Without words or breath near her ear, just my embrace made her climax. My cum and hug pushed her lust beyond capacity, triggering an orgasm from pure love and arousal.

“Ah, aah, ah…! Onii… hya… nnh—!!” Exhausted, she collapsed to her knees, her wet panties peeking through her hair, obscenely erotic.

I wanted to keep them. Calmer, I thought rationally.

“Faa, hia, uu… wait… if this becomes a habit, I’ll cum just hearing your voice…”

Miyu, still reeling from her continuous orgasms, touched her ears, seemingly self-conscious, and turned away to hide the wet stain from her leaking juices.

“I keep falling more in love with you, and it feels great,” I said.

“I agree, but like I said, it might break my brain someday…”

Trying to conceal the stain, she realized her wet pajama pants were the issue. Switching to a no-panties T-shirt style, she stood, barely covering herself. Imagining her bare body beneath reignited my spent arousal, but I forced myself to look away. She’s practically a succubus, living to make me cum—half-human, half-demon, probably.

“I’ll clean up and be right back. Wait in bed, Onii-chan. Let’s sleep together tonight.”

Lately, Miyu clings to every moment we can share, rushing through chores to return quickly. Her cuteness has been keeping me up at night, staring at her sleeping face. Who said beauty gets old in three days? I never tire of her.

“Ready, Onii-chan. Let’s cuddle and sleep,” she said.

In bed, we hugged, switching to hand-holding when shifting positions—our sleep routine.

We were head-over-heels. With our parents’ approval, Yamamoto-san’s support, and likely blessings from Yuka, Haruka, and Sachiko, our future felt secure. We’d keep being lovey-dovey, having sex, eventually having kids to show our parents, building greater happiness. Together, no obstacle scared us. Past flings with other girls only confirmed it: my sister is the best lover. Some might see this path as one form of happiness.

But our extreme lovey-dovey state was a thorny road, and for me, it was becoming a problem. The issue surfaced the next day.

“…Haa… Miyu, I’m cumming… Drink it.”

“Nmu… nku… nn…”

Waking up gazing into each other’s eyes, we gave in to morning lust with a blowjob and mouth cumshot.

“That was a lot for the morning,” she said.

“It’s not full recovery after that much, but once morning and night? I can handle daily.”

“Hehe, reliable. I’m a bit unsatisfied, though.”

Miyu sucked my still-hard cock, guiding it into her vagina herself.

“Nn… haa… After drinking your cum, my vagina gets so sensitive… feels amazing…”

“Fuh, nn… Glad to hear it.”

“Mind if we do more oral from now on?”

“Of course. You’ve always wanted to drink more.”

Back when she was less open, she never admitted it, but she’s always loved mouth cumshots. I planned to balance creampies and oral.

“If I’m horny at school, it’s trouble… Make me cum hard.”

“Morning’s okay for that?”

“I’ll nap at school if I’m tired.”

“Keep that rare, okay?”

I sat up, pinned her down, and fucked her missionary-style, thrusting hard. Two ejaculations after yesterday was tough, but to celebrate parental approval, I’d indulge her whims for now.

“Miyu… Miyu…! I’m cumming inside… Creampie… Miyu…!”

“Nnh… aah…! Onii-chan… come, come…!”

Doku, doku, cum spilled into her vagina, and she collapsed, exhausted. Waking early gave her time to rest.

(Phew… After the weekend’s loli-cosplay sex, this is rough…)

I showered, dressed, and started breakfast. I wanted Miyu to rest, but I made enough for our parents too.

(I told Miyu it’s fine, but I might end up napping at school…)

My studies were improving. Unlike superhuman Yamamoto-san, I can only do so much for Miyu. I’ve slacked my whole life, but now I need smart shortcuts—for her sake too.

After prepping for school, I checked on Miyu. Planning to wake her, I found she’d set an alarm and was already up.

“Morning, Onii-chan. Thanks for prepping and the morning sex.”

“No big deal.”

Sex and chores are my small ways to repay her. No matter how mature our relationship gets, I won’t forget what she’s done for me.

“I feel bad leaving it all to you. I’ll cook tomorrow.”

“You’ll be tired. Don’t push it.”

“No real sex, so I’ll manage.”

True, physically she could, but drinking my cum makes her horny. Skipping both creampies and oral might work, but she’d hate that.

“While sucking you, I can touch myself, so no separate masturbation time.”

“Genius.”

That solves time issues. Morning sex before school is her fantasy, so we prepped clothes and bags the night before to maximize sex time.

Unlike before, she’s open about her sexual desires—a joyful change, though I felt a twinge of loneliness, like a parent watching a child grow.

After breakfast, she showered, dressed, and we headed to school. Her uniform always looks sharp, and knowing this cute sister has passionate sex nightly—with me—makes me glad I’m her partner.

“See ya, Onii-chan. I’ll be late, so rest up.”

“Got it. Take care.”

We kissed at the door, a deep one that got her worked up, earning a playful glare as she left. I biked to school. We sometimes walk together, but I want to make it a habit, especially since she’ll join my school eventually.

The problem hit later. Arriving home before Miyu, who was delayed by school duties, I napped and woke to my alarm in the evening.

The house was quiet—parents and Miyu still out. Groggy, I washed my face, thinking about dinner and checking my phone for recipes.

“…Huh?”

I thought my phone was hacked.

A flood of notifications, mostly from our shared calendar app, all from Miyu.

“Recurring: Morning kiss to making out. Cum in my mouth if you need to. Every morning.”

“Recurring: Welcome-home kiss to creampie. Every weekday.”

“Recurring: Goodnight kiss, long and slow. Every night. If I get horny, I’ll do anything to make you cum.”

“Today: Make up for missed bath licking, full-body if possible. I’ll return the favor.”

“Tomorrow: I love cumming from just kissing, please.”

And on for two weeks—her desired acts, demanding three to five ejaculations daily. I hoped it was a joke, but her morning behavior suggested otherwise.

“I’m home.”

The door opened. Greeting her at the entrance, I saw Miyu, stone-faced, setting down her bag.

“Welcome back, Miyu. Good work.”

“Yeah, it was tough. Nn.”

She closed the distance, barely kicking off her shoes, and demanded a kiss. Her neutral expression hid her lust, unleashed by my kiss.

Her closed eyes and tilted chin were irresistible. I kissed her, and it turned deep instantly. Tongues battled, heedless of wrinkled uniforms, pulling each other close. I was swept away by my sister.

Post-kiss, her face was visibly aroused. Her lust wasn’t calm—it was masked, unleashed by my kiss.

“Did you rest, Onii-chan?”

“Yeah, a lot.”

“Good.”

Stepping up, she pressed her chest against me, smiling seductively.

“Then you can cum tons tonight.”

Her melted smile touched my bulging cock through my pants, licking the precum off her fingers.

“As per the schedule, Onii-chan.”

Looking back, I should’ve sensed something when she savored my cum last night, saying it was “delicious.” Loving the thrill of drinking my bitter, thick load, she’d shifted fully into baby-making mode, even her taste buds changing.

It wasn’t just intimacy—my relentless erotic acts pushed her arousal past its limit.

Too much sex broke her libido.