My Little Sister Suddenly Confessed to Me, but What Am I Supposed to Do by Dating My Little Sister?

Chapter 60: Summer Vacation, the Sea, and Swimsuits!!

After a flight of a little over three hours from Haneda, Ishigaki Island came into view as the plane began its descent. The blue of the sea was entirely different from any I had seen before, and I found myself staring, lost in its beauty.

While not as scary as takeoff, I still clenched my teeth during landing. Even so, my sister held my hand with a smile…

“Ooooh! It’s hot, but it’s pretty crisp!”

Michiru raised both hands high, basking in the sunlight. On top of being a silver-haired beauty, her tube top look meant her midriff was exposed even further, and her pale skin—already eye-catching—completely fixed my gaze.

“Gyah!”

“Come on, let’s go, Onii-chan.”

My sister walked past me, stepping on my foot with her rolling carry-on bag. That was the second time today. Ah, I knew this would happen, but I can’t help looking. It’s a far cry from being on the plane earlier.

No, maybe that’s exactly why…

Since it was already nearing evening by the time we arrived at the airport, it was too late for sightseeing, and our luggage would just get in the way of shopping. So, we headed straight to the hotel. There are no trains on Ishigaki Island; since none of us have licenses, transportation is by bus or taxi. We boarded the hotel bus. Along the way, we saw the blue sea, coral reefs, signs saying “Men-sore” (Welcome), and palm trees—the tropical mood was steadily rising.

After a while, we arrived at a top-class hotel in Ishigaki, a triangular building part of a major airline’s chain.

“W-wow, so this is it.”

I was moved by the hotel, which I’d seen in photos and on TV, and felt grateful to Asami.

“Wellll, I’ll go check innn… everyone, wait hereee.”

Saying that, Asami walked toward the front desk. Even though it’s peak season, it’s a weekday, so there aren’t too many people, but there’s still a bit of a line at the front.

As I waited in the spacious lobby feeling a bit nervous, Asami returned from the desk.

“Check-in is doneee! The concierge said they were busy and asked us to wait for an escorttt… but I told them it was okayyy. Here are the keysss. These are the keys to your room, Yuu-kun and Shiori-channn.”

With that, I was handed a single card key.

…Eh? One? For me and my sister?

“Well, what shall we do for now? Head to the beach?”

Michiru confirmed the next plans.

“Umm… only the early time slot was available for dinnerrr… and it’s coming up soonnn. So, we should bathe firsttt, then dinnerrr.”

“I see. Then the swimsuit reveal is tomorrow! Is there a hot spring or something for the bath?”

“Wellll, there isn’t a hot spring, buttt… there’s a large public bath and a saunaaa.”

“Alright, let’s all go! Though Yuu can’t come in with us… what’s wrong?”

While Michiru and Asami were talking, I was staring at my sister, and she was smiling, avoiding my gaze.

“I just… thought there were two rooms…”

“Since we added to the pair tickets, it ended up being two roomsss… but if it were a four-person room, I couldn’t have invited you, Yuu-kunnn.”

That’s true. Moreover, because I’m here, I can’t share a room with anyone but my sister. But sharing a room with my sister… are you serious?

The four of us headed to the rooms. They were on the same floor but far apart. Since they were in opposite directions from the elevator, we parted ways there for now.

“Wellll, I’ll come pick you up laterrr!”

Saying that, Michiru and Asami walked down the hallway.

“Come on, Onii-chan, let’s go.”

She snatched the card key from my hand and walked toward the room. Not yet… I can’t make a scene here… I followed her in silence.

My sister swiped the card key, opened the door, and went inside.

“Wow! It’s so big! So spacious!”

She ran into the room as soon as she entered. The door clicked shut…

“Sh-Sh-Sh-Shioriiiiii! Was this what you were talking about?!”

With the sunset ocean view behind her, my sister turned around, gave a full-faced smile, and playfully stuck out her tongue (choro).

“I mean, it can’t be helped, right? Oh, would you have preferred to be alone with Asami-chan, Onii-chan?”

“No, there’s no way I could do that! I mean, but…”

“Ehehehe. We’re siblings, after all!”

Siblings staying in the same room. Morally, there’s no problem, but does that apply to us? No, it’s not like I’m going to lay a hand on her or anything. Wait? In that case, is it actually fine? Eh? But…

While I was thinking about that, my sister started rummaging through her luggage.

“Hey, since it’s a hotel, they won’t have yukata, right? Ah, actually, you’re not supposed to walk outside the room in yukata anyway. What should I do about the bath… First, a change of clothes… a bra, panties, a T-shirt, and a skirt should be fine. But dinner is at the restaurant, so maybe a look that’s too casual is no good?”

She pulled out colorful underwear and a skirt right in front of me.

“Whoa, whoa, whoa, wait, Shiori! You’re too comfortable! I mean, aren’t you embarrassed showing your underwear like that…?”

“Eh? Are you interested, Onii-chan? Here, these are today’s panties. Cute, right? This ribbon is especially cute.”

My sister held up a pair of pink panties and showed them to me.

“No, no, no, no, no, no! You don’t have to show me!”

Just then, the room chime rang, followed by a knock.

“Ah, Asami-chan and the others are here. What about you, Onii-chan?”

“Ah, I’m just one person, I’ll just use the one in the room. You go ahead.”

“Okaaay! I’m off!”

With that, my sister left with the other two for the public bath.

Left alone, I sat on the bed and looked at the clothes and underwear left on the opposite bed.

“Ah, seriously… this is why I wasn’t looking forward to this.”

Forget starting tomorrow; this restless situation starts tonight…

“Sigh… I just want to stay home and read a book…”

Chapter 61: The Three Confessions

The three girls were at the hotel’s large public bath. Since people were still at the pool or the beach, and because the guest rooms in this hotel had large, beautiful baths, they had the place entirely to themselves.

“Wow, it’s not that big, but it’s empty!”

Shiori entered first, wrapped in a towel.

“Waaa… no one’s hereee.”

“Oh, it’s quite nice, isn’t it?”

The other two followed her in.

“Asami-chan, yours really are huge. Ugh. Ah! Michiru-chan, so yours are silver too.”

“D-don’t look!!”

To an entirely exposed Michiru, Shiori said something outrageous before heading off to rinse herself with the warm water.

“Haaa… this feels so good.”

The three were soaking in the tub side by side. Just as Shiori was thinking it was a shame it wasn’t a natural hot spring, the usually mild-mannered Asami began to speak with a serious tone, her tension slightly higher than usual.

“Um, Shiori-channn… I’ve been wanting to ask you something for a long timeee.”

“Eh? What is it?”

The change in atmosphere sent a ripple of surprise and tension through Shiori. Sensing the mood, Michiru fixed her gaze on the two of them.

“Shiori-channn… do you love your brother… do you love Yuu-kunnn?”

“Yeah, I love him. I love him so much.”

The moment she heard that immediate response, Michiru’s face turned to one of shock. However, Asami’s expression remained entirely unchanged as she continued.

“Is thattt… as a brotherrr? Orrr…”

“I don’t believe it’s sibling love. I love Onii-chan—I love my brother—as a man.”

Shiori answered Asami with a serious face, cutting in quickly. Michiru looked even more astounded.

“I thought sooo. I’ve been wanting to ask for so longgg.”

“Yeah.”

“You seeee, since we’re on this trippp… and considering what comes afterrr… I really wanted to say it clearlyyy. Me tooo… Shiori-chan, will you listen to meee?”

Asami looked detached but stared intently into Shiori’s eyes as she made her confession.

“…I love Yuu tooo. I love himmm.”

Confessed to her face that she loved Yuu, Shiori remained silent, listening to what came next.

“You seeee, since elementary schoolll, because of the way I speakkk, I was always lonelyyy. Everyone called me slow or sluggishhh, and they avoided meee. Seeing themmm, I closed myself in my shellll. I was lonelyyy. It was harddd.”

“…But Yuu saved meee. Gently, without rushing meee, he slowly broke my shellll…”

“Yuu is the savior of my lifeee… I hated myself so much that I wanted to dieee… he’s the savior who rescued meee…”

Shiori simply stared back into the eyes of the girl who confessed she loved him because he was the savior who had rescued her.

Suddenly, Michiru, who had been listening beside them, stood up abruptly in the tub and made a declaration to both of them.

“Wait! Wait a minute! Me! I love Yuu too!! Yuu is the person who saved me when I was constantly facing prejudice because of my appearance! I’m only here today because Yuu was there… because he was there for me! I love Yuu too! I… I love him…!”

Shiori looked at the two of them and sat on the edge of the bath, smiling slightly.

“I knew. I knew both of you liked Onii-chan. You didn’t have to say it so clearly for me to know.”

Saying that, Shiori’s face took on a slightly lonely expression as she spoke to them.

“Both of you have a reason for why you fell in love with Onii-chan. I’m a little jealous of that… See, I don’t know why I fell in love with him. By the time I realized it, I already loved him. But when I was little, I thought it was sibling love, or family love…”

“So I watched him. I kept watching my beloved brother. And when I did, I realized he’s amazing. He’s wonderful. You two understand that, and although Onii-chan himself hasn’t noticed, I knew. I’ve known for a long time…”

Shiori looked up and spoke slowly, as if recalling the past.

“I fell deeper and deeper in love. This definitely isn’t sibling or family love. I love him, love him, love him, love him… I love him so much I can hardly stand it. To the point where I couldn’t go on living without him…”

“I kept watching him, and because I wanted to be worthy of such an amazing brother, I followed his example… You know how I have a lot of friends? That only happened because I was imitating him…”

“Eh? But Yuu doesn’t really have many friendsss…”

For the first time, Asami’s expression changed, her face showing a bit of confusion.

“…That’s because he’s too kind. Does he think he doesn’t want to get in other people’s way, or that he doesn’t want others to have to worry about him? Well, it’s also because he’s a bit lazy, but… you know there’s always a risk in calling out to a total stranger, right? So he always suppresses it. But if he truly feels that person wants help, he’ll step in for anyone. He doesn’t think about himself.”

“I thought that was incredible. When I realized that, I fell in love all over again… but… that’s not the reason I love him. My love for Onii-chan is an accumulation…”

“But I’ve been thinking lately. It’s actually incredible not to have a reason for falling in love. Because it means you’ll never come to hate them. If you love someone because they’re kind, what happens if they stop being kind? If you love them because they’re cool, what if they aren’t anymore? If you love them because they saved you, what happens if they can’t save you next time? I have no reason for loving Onii-chan. Therefore, no reason for me to hate him can ever exist…”

With that, Shiori stared at the two of them.

“Th-that’s unfair! That’s just your way of thinking! I might not have the ‘accumulation,’ but in terms of depth… I won’t lose in depth!!”

“Even if he can’t save me next timeee, I would neverrr come to hate Yuuu.”

The two of them said this toward Shiori.

“Eh!”

“Eh?”

They both let out voices of surprise and bewilderment.

Because the moment they spoke those words, a single tear fell from Shiori’s left eye…

Chapter 62: Shiori’s Resolve

“I’m sorry.”

Saying that, Shiori wiped her tears with her fingers.

“I just thought… you two are so pure. I’m a bad girl. My heart is ugly…”

Asami and Michiru didn’t understand what Shiori was saying, but they couldn’t look away from her serious expression.

“I exploited Onii-chan’s kindness… his kindness that would never betray me.”

“Back in middle school, I saw Asami-chan and Onii-chan talking so happily together, and I thought: At this rate, someone is going to take him away from me. That’s why I confessed to him the day before the entrance ceremony.”

“Eh!!”

The two of them shouted in unison.

“I was terrified, but Onii-chan accepted me so gently.”

“I was so happy. I was on cloud nine. But then, one day, I realized—wasn’t I just taking advantage of his kindness? When I realized that, I hated myself so much I wanted to vanish from his sight. I wondered why my heart was so ugly.”

“But I have no one but Onii-chan. I have many friends, and I love and cherish them all. But compared to Onii-chan, they aren’t ‘necessary’ to me. If something happened to him, I wouldn’t hesitate to use everyone. Even if everyone hated me for it—no, even if the whole world hated me—if Onii-chan is saved, if only he is there, I don’t need anything else. I have such a selfish, ugly way of thinking.”

Knowing Shiori’s popularity and the depth of trust people had in her, they were horrified by her resolve—that she was prepared to use and lose everything for her brother’s sake.

“Does Yuu know… that you think like this?”

Michiru, already confused by the fact that they had been dating, felt a chill run down her spine as she asked.

“I told him. I told him I used him, and that he should break up with me.”

Recalling that moment, Shiori’s eyes filled with tears again.

“And thennn?”

Asami, noticing Shiori’s emotional shift, moved closer and sat beside her to ask.

“He told me… that he and I could never truly part for the rest of our lives. That’s why he said we would continue as siblings from then on…”

Shiori smiled happily, thinking of her brother.

“Then, what if… what if I told Yuu about what you just said? About being willing to betray everyone? What if he got scared of you… and grew to hate you?”

Michiru felt a twinge of jealousy at the smile Shiori wore and the words she’d received from Yuu. Driven by a mischievous impulse born of that fear, she asked the question casually.

“Eh? …If that happened, I… I’d have no choice but to die…”

Shiori began to sob uncontrollably while wearing a wide, radiant smile.

By “dying,” she didn’t mean suicide. For Shiori, being rejected or hated by her brother was the same as being in a world with nothing—entering a world of void. It was the same as being dead.

“I-I’m sorry! I didn’t mean to—”

Seeing that crying face, Michiru apologized while crying herself.

“If Onii-chan… if Onii-chan hates me, there’s no… meaning… to me living…”

Her tears wouldn’t stop. She tried desperately to hold them back, but she couldn’t stop the overflow.

Michiru kept apologizing through her tears. “I’m sorry, Shiori, I’m sorry.”

Asami gently pulled Shiori’s head to her chest.

“It’s okayyy. The Yuu we fell in love with… would never hate you for something like thattt.”

“U-uh, yeah… but, buttt…”

She knew. She knew that, but being made to imagine a world without her brother caused various emotions to pour out along with her tears.

Michiru sat on the other side of Asami and hugged Shiori’s head from above.

“Sorry, Shiori. I’m sorry. It’s okay. Yuu will never, ever hate you.”

Shiori couldn’t stop crying. She tried, but she couldn’t stop.

Feeling the sincerity of their confessions—their seriousness regarding her brother—she had bared her own soul in response.

She had exposed her inner self, even things she had never told her friends or her brother. She had poured out everything to them.

The muddy, unspoken thoughts that had been accumulating inside her were released. The relief, the anxiety, and the mix of emotions became a flood of tears.

“Shiori-channn… crying over something like thattt… means you don’t trust your brother enoughrr. I feel relieveddd. You still have a long way to gooo.”

“That’s right! It means we still have a chance!”

“Yeah, hic… that’s not… hic… waaaaah!”

She wanted to say something, but she couldn’t get her voice out.

“Shiori-channn… thank you for telling usss. Buttt… I won’t lose eitherrr. Definitelyyy.”

“I won’t lose either!”

“Yeah… hic… I… I won’t lose either! I won’t! I absolutely hate the thought of him being taken away!!”

Shiori squeezed out her voice with all her might. She lifted her head slightly, tears still falling, and continued.

“But, you know… if Onii-chan chooses one of you, or another woman, and if that makes him happy… I will accept it. His happiness is my happiness…”

“However, even then, I won’t give up on him. Even if he’s taken, I won’t stop until he thinks being with me is happier. Even if he gets married, even if he has children, I won’t give up. Because that person would be a stranger. If you grow to hate each other and part ways, you’re total strangers. But Onii-chan and I can never be strangers as long as we live. We’ll be connected forever. This is my greatest weapon. That’s why you two can never beat me.”

Shiori used the last of her strength to declare her supremacy to them.

“Uu, so that’s how it is? Well, I’m going to stay with Yuu until I die too!”

“Me tooo. It’s a match thennn, Shiori-chan, Michiru-chan.”

“Yeah.”

The two of them pressed against Shiori, hugging each other while crying.

“…Hey, Michiru-chan.”

“What?”

“Your chest… your bones are hitting me and it hurts my face…”

“Wha-wha-wha—!”

Michiru pulled away, turned toward Shiori, and spread her arms as if to say Look!

“Look closely! Even I have a little bit! Look properly!”

She showed off her chest ostentatiously.

“Hiii!”

Just then, a strange shriek came from the entrance.

The three looked that way to see an elderly lady who had come for a bath, wearing a look of sheer shock.

“A-A-Are you okay?”

The lady asked worriedly.

For a second, they wondered why she was asking, but then they looked at the situation: one girl with her arms spread wide saying Look at me, and two others hugging and crying—all of them naked.

Two victims cowering from a pervert? And one looks like a foreign girl…

“It’s nothing!!”

Understanding the bizarre nature of the situation, the three scrambled into the locker room to escape.