My Girlfriend Wanted an Open Relationship, So I Broke Up with Her and Found a Sweet Yandere

[Present.]

The door clicked shut behind Haruka, leaving the room eerily quiet. Yuuta sat there, frozen, his mind spinning in all directions. The memories came flooding back, replaying themselves over and over like a broken record.

Both of them had grown up in the same small town, far from the hustle and chaos of the city. Back then, they were inseparable—two kids dreaming about the future. Tokyo seemed so far away, like another world entirely. Haruka finished high school before him, and when she moved to the city, he didn’t mind. He was happy for her, even proud. And a year later, when he graduated and followed her to Tokyo, he never imagined that things would change so much in that short time.

*Was she like this before?* The thought gnawed at him. They’d just started college a few weeks ago. *Was she already seeing someone else while I was back home?* His heart sank. He could feel his pulse quickening, his chest tightening with every possibility that crossed his mind.

*What if she’s already cheated?* The question hit him hard, sending a shockwave through his body. *Is that why she wants this “open relationship”? Just to get rid of the guilt?*

The more he thought about it, the more the pieces fell into place in the worst possible way. The Haruka he thought he knew, the one he loved with every part of himself, suddenly felt like a stranger.

Yuuta reached for the glass of water in front of him, his hand trembling slightly. He gulped it down, but it didn’t help. The food on the table looked dull and lifeless, the once vibrant colors fading into a grey blur. His appetite was gone.

His eyes fell to the bracelet on the table, the one he had given her just earlier tonight. There were two of them—a pair, one for each of them. Haruka had taken hers, leaving this one behind. He picked it up, staring at the delicate engraving, the careful craftsmanship. It had cost him so much, three years of savings—all the money he had set aside for his education, money he didn’t need thanks to his scholarship. And he had spent it on this, believing it was the perfect way to show his love.

Now, it just felt like a cruel joke.

His grip tightened around the bracelet as the weight of everything bore down on him. How could things have gone so wrong, so quickly?

[Yuuta’s POV.]

It’s the same. Everything is just the same… nothing changed. The restaurant, the table, the food. All of it. Yet everything feels different now, warped by the conversation that just shattered my world. I took a deep breath, trying to calm the chaos in my mind. I have to get out of here.

The door creaked slightly as it opened, and there she was again—Haruka. She leaned in, her voice soft, like she hadn’t just broken me moments ago. “Can I come inside?”

Her face, the one I’d loved for so long, now felt like a dagger twisting deeper with every glance. But I didn’t let it show. I kept my poker face on, forcing myself to nod, like I was unaffected. Like I wasn’t crumbling inside.

She stepped back in, but it wasn’t the same girl I had fallen in love with. I don’t know who this person is anymore or how she became like this. But one thing’s for sure—I can’t stay here. I can’t let her play with my emotions any longer.

I have to get out. Before she shatters me even more.

[Yuuta’s POV]

She sat down across from me, eyes flicking between mine and the table. Haruka always did this when she was trying to ease into something uncomfortable. But I knew what was coming. She wasn’t just going to bring up the “open relationship” casually; she was going to push until I gave in. She always did.

“So… about what we talked about earlier,” she started softly, her voice careful but determined. “I think this open relationship idea is important for us, you know? It’ll help us grow, give us some freedom. We’ve been together for so long…”

I looked at her, trying to keep my breathing steady. I didn’t want to say yes. The thought of agreeing made me sick, but I’d been here before. When Haruka didn’t get her way, things turned ugly. I’d seen the rage in her eyes, the outbursts that started small but quickly escalated. She wasn’t afraid to throw things or push. Last time, she slapped me. I wasn’t going to let that happen here, not in this restaurant, not in front of strangers. I had to get out of this cleanly, then I could break things off later—through a text. No drama, no confrontation.

“Yeah… I get it,” I said, forcing the words out of my mouth. “If this is what you want, then… okay. We can try it.”

Her face brightened instantly, like I’d just handed her the world. The sight of her being so happy—*this happy*—about something that was ripping me apart made me want to throw up.

“I knew you’d understand!” she said, her voice full of relief. “You’ve always been so good to me, Yuuta. I knew you’d never let me be sad.”

Her words stung. Deep down, I knew they were true. I’d never said no to her, not once. Every time, I’d agreed to whatever she wanted, thinking it was love. Thinking that if I kept her happy, things would stay okay. She was the only person I could really call family after all.

What a fool I’ve been.

“I should go,” I said abruptly, the walls of the restaurant suddenly feeling too close, too suffocating. I couldn’t stand to be near her anymore.

Haruka frowned. “Go? Why? We’re a couple, Yuuta. It’s Valentine’s Day, and we should spend it together.” She leaned forward, her eyes lighting up with excitement. “I was thinking we could go back to your apartment, just the two of us. You know, make the most of the night.”

I could barely keep the disgust off my face. The more she talked, the more sick I felt. She was talking about being with me, about being intimate, right after pushing this open relationship on me. I couldn’t stand another minute of it.

“I can’t,” I said, too quickly. “I have something I need to take care of.”

Her smile faded, but she forced it back. “Okay… if you’re sure. I just thought it’d be nice to spend the night together.”

“Maybe another time,” I muttered, already standing up, wanting to escape.

Reluctantly, she stood too, leaning in to kiss me. Before I could pull away, her lips pressed against mine. I kept my face neutral, refusing to show the revulsion rising in my chest.

As soon as she pulled back, I grabbed my coat, barely mumbling, “I’ll text you later,” before walking out of the room. I knew I wasn’t texting her later. I was breaking up with her over text the minute I was alone.

I rushed down the hallway, practically running to the common bathroom. Once inside, I barely made it to the sink before I started retching uncontrollably. Everything came up—the disgust, the betrayal, the sheer nausea of it all. My entire body shook as I heaved.

I needed to end this. Tonight.

[A/N: Ohh she makes my blood boil!!!]