I Was Heartbroken After Discovering My Girlfriend’s Infidelity, but Suddenly I Became Popular With Girls - 8

Chapter 8: Nanami-chan’s Confession

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Nanami-chan was absolutely livid.

“Big sister, I’m telling Mom about this. I’m honestly ashamed that a woman like you is my sister. I’m cutting ties with you too. How could you betray someone as kind as Ryousuke-san? Can you even comprehend how Ryousuke-san feels right now? No, of course you can’t. You’re an idiot. If he dumps you, you have nobody to blame but yourself. Do you understand?”

“…”

Riona remained silent, weeping while still prostrated on the floor.

“Ryousuke-san, I am so incredibly sorry for my trash of a sister. I want to cut ties with her too, but she’s still my sister. This trash sister of mine will probably keep cheating over and over again, no matter who she dates or even if she gets married. So, I have a proposal and a request. If we make this trash sister experience the same thing you did, Ryousuke-san, I think she’ll finally understand your feelings. Then she’ll never betray a partner ever again.”

“Wait, are you saying I should cheat on her?”

Riona looked up and pleaded with me.

“I’ll never betray Ryo-kun again. So please don’t talk about breaking up. I love Ryo-kun from the bottom of my heart. I’m so sorry. I’m so sorry.”

Riona’s face was already a mess of tears. But Nanami-chan was relentless.

“Shut up, you idiot sister! I can’t trust you at all. You’re just saying whatever is convenient right now. Ryousuke-san, please help me transform this trash sister into a woman who will never cheat again. I believe she is head-over-heels in love with you. Therefore, if you hold another woman right in front of her, she’ll learn the pain you’ve suffered. Please, let that woman be me.”

(What? Nanami-chan is the partner?!)

I never expected that to come up. But Nanami-chan, I already knew Riona was cheating. I suffered until I met Yuna, but since hearing Yuna’s confession, I hadn’t really been hurting. In fact, I was almost grateful to Riona for cheating. When I first found out, it felt like my heart was being squeezed for a short while, but I met Yuna right after, so the infidelity was nothing to me now. 

(However, there’s no way I can say that.)

Riona, who had been listening silently to Nanami-chan’s speech, flew into a rage.

“Nanami! I will never allow that! Ryo-chan is my boyfriend! You’ve liked Ryo-chan for a long time, haven’t you? Yeah, since high school. I know you used to masturbate while thinking about him! That’s why you’re trying to steal him away while pretending it’s for my sake! If you do that, I’ll kill you!”

Nanami-chan’s face turned beet red and her eyes narrowed sharply. Riona looked exactly the same. I had never seen either of them look like this.

“Yeah, that’s right! I love Ryousuke-san. I love him more than anyone. That’s why I haven’t dated anyone else until now. I wouldn’t cheat like my idiot sister. I love Ryousuke-san with all my heart. Besides, an unfaithful idiot like you has no right to date him!”

It was a shocking confession. To think a beautiful girl like Nanami-chan liked me so much she hadn’t dated anyone else. I felt bad for Yuna, but hearing that made my heart flutter just a little. But the sisters’ quarrel continued. I never thought I’d be at the center of such a gruesome scene.

“You say you haven’t dated anyone, but you’re not a virgin, are you? I saw you using a vibrator to masturbate, moaning ‘Ryousuke-san’ and everything. I’ve been on guard against you ever since then. That’s why I tried to keep you from seeing Ryo-chan as much as possible!”

(What? Nanami-chan used a vibrator? And she’s not a virgin? But she just said she hadn’t dated anyone.)

“I borrowed the vibrator you were using and broke my hymen with it! I swear I’ve never let a man inside me. I’ve been devoted only to Ryousuke-san! You’re the one who should go to a gynecologist, Big Sister. Aren’t you pregnant with that guy’s baby? It looked like you were doing it raw.”

(Ah, I see…)

But honestly, I couldn’t stand listening to this anymore and just wanted to go home.

“Look, it’s late, so let’s end this for today. Riona, it’s difficult for me to trust you anymore. Let’s break up before we end up hating each other. Nanami-chan, I’m hurt, but I don’t want to hurt Riona back as revenge. I appreciate your feelings, but even if Riona and I are over, if I dated you, it would end up hurting her anyway. So, I’m sorry, I can’t date you. I wouldn’t mind going out for a meal occasionally, though.”

(After all, I have Yuna. But even though they’re different types, Nanami-chan is cute too. In a few years, she’ll likely become a real beauty.)

“Ryousuke-san, you’re too kind. That’s why this idiot sister of mine got carried away!”

“Wait, wait, please! Let’s start over. Please, I’ll really change my ways, I beg of you!”

“How stupid. Who’s going to trust you even if you say you’ll change after showing us a scene like that? You’re just a lewd, cheating woman. You’ll cheat again and again. Right, Ryousuke-san?”

Nanami-chan continued to disparage Riona thoroughly. I felt like I was seeing an unexpected side of her.

“Let’s talk one more time later. Riona, I’m returning the key to this room. I’m going home now.”

“Ryo-chan, wait! Please!”

“Ryousuke-san!”

Both of them clung to me, but I ignored them and left the apartment. I could feel my own heart turning cold. 

(Ah, I want to see Yuna soon and be healed. Tonight, I want to mess Yuna up.)

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I finally made it back to my apartment. On the way home, my phone wouldn’t stop ringing, but I didn’t answer at all. Once I was back in my room and processing various tasks on my computer, the intercom rang.

“Yes, this is Tawara.”

『Ah, Ryo-chan, I keep getting an error when I put in the PIN.』

It was Riona. She must have followed me immediately.

“Yeah, I changed the code.”

『Why?! Anyway, let me in!』

“No, I don’t want to see you right now. Let’s both take the night to cool our heads.”

『I want to talk with just the two of us, please let me in!』

I ignored her. Then, I called the management office on my mobile.

“Excuse me, but could you please tell the woman outside to go home? You can tell her that if she doesn’t listen, we’ll call the police.”

I turned off my phone and took refuge in Yuna’s room. Yuna welcomed me with a worried expression.

“How was it?”

First, I told her everything up until the point where the Arai guy went home.

“Whoa, you caught them right in the middle of sex? Ahaha, and then the police were called?”

“Yeah, it was a nightmare. Well, they took statements and I found out about everything.”

“Hmm, so that homewrecker Arai has completely cut ties with Riona-san, then.”

“I suppose, but I’m still feeling a bit restless about it. I plan to punish him.”

“How?”

“I have an account at N Securities. I’m even on their VIP list. So, I’m going to talk to my representative, explain the situation, and see if they can impose some kind of disciplinary action on him. If not, I’ll tell them I’m closing all my accounts.”

“Since the police were involved, there’s no way to hide it. Still, I didn’t realize you were that wealthy, Ryousuke-san.”

“It’s not that much. I’ll head to N Securities tomorrow.”

“What happened with Riona-san? Did you manage to break up?”

I didn’t really want to talk about it, so I let her listen to the recording on the IC recorder.

“I see. It’s certainly an interesting idea, but I think Riona-san would go insane if Ryousuke-san had sex with her sister right in front of her. She’s already sustained significant mental damage from you saying you’re breaking up. She probably thought you’d forgive her if she just apologized. If you do something like that on top of it, she might commit suicide or even kill her sister.”

“Well, I wouldn’t actually go that far.”

“No, I think it’s a good move if you don’t overdo it. It would definitely help her understand the feelings of the person being cheated on, and she’d realize the magnitude of what she lost. She was drunk on the thrill and sense of immorality, but I think this would definitely wake her up, and she’d swear never to cheat again. Even if she breaks up with you and gets a new boyfriend, I don’t think she’d cheat again. Essentially, it becomes a trauma for her.”

“I see, it would be for her own good then.”

“Well, even so, I don’t think she’ll give up on you. She might become a stalker.”

“Actually, she already has.”

“What, already?”

“Yeah, Riona charged over to this apartment just a moment ago, but she couldn’t get in because I changed the PIN. We talked through the intercom, but she was being so loud I told the management office to tell her to go home, and that it was fine to call the police on her.”

“I see. Ryousuke-san, I’m saying this now because of that, but Riona-san isn’t going to give up on you.”

“Then what should I do? Should I move somewhere else?”

“That’s no good, I can’t move away from here. So, for now, make Riona-san your sex friend. Don’t date her, and don’t go out for meals. Just make her an acquaintance you have sex with in her room. However, tell Riona-san she’s free to get an official boyfriend whenever she wants. Tell her it’s not cheating because you aren’t her boyfriend, you’re just an acquaintance she has sex with. And every time, make sure it’s loveless sex. Sex like you have with me is absolutely forbidden.”

“Wait, is that okay with you, Yuna? Well, I don’t have any affection left for Riona anyway, so I’m sure the sex would be pretty dry.”

“But make sure you definitely break up with her within three years. Because in three years, I’m becoming your official girlfriend. And you must promise to hold me every single day.”

“I… I understand. I promise.”

“Riona-san probably won’t be satisfied and will eventually get an official boyfriend, so you can break up completely then.”

“What about Nanami-chan?”

“After you’ve made Riona-san your sex friend, kiss Nanami-chan in front of the apartment and take her up to your room. Riona-san will likely be watching, so you can plant that trauma then.”

“I see. Alright, I’ll go talk to her tomorrow.”

And so, my wicked plotting with Yuna ended. 

(I wonder if it will go well. However, I can’t help but feel like I’m moving exactly as Yuna says.)

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