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

“Okay, this should be fine. Let’s go.” Sensei’s calm voice broke the stillness as she locked the door behind her. I stood there, hands in my pockets, watching her. Today, she looked like the Hayami-sensei I knew—dignified, professional, and perfectly composed. The warmth and vulnerability she’d shown last night were gone, as if they’d been swept away with the dawn.

We descended the stairs in silence. The faint echo of our footsteps bounced off the walls, creating a soft rhythm that matched the tension between us. I glanced at her, but she didn’t meet my gaze. Instead, she was focused, her posture straight as if she had already shifted back into her usual, composed self.

When we reached the bottom, Sensei finally broke the silence, her voice soft but measured. “So, Takahashi-kun, what will you do today? Are you going to university or heading home?”

I shifted slightly, staring down at the street ahead. “I think I’ll skip today. There are a few things I need to sort out before I can focus again. Besides, it’s almost the weekend. I’ll catch up then.”

She nodded, accepting my answer without further comment. The conversation died once more as we walked toward the train station. The sky overhead was a dull grey, thick with clouds that threatened rain at any moment. The air was cool, carrying the scent of damp concrete, and the distant rumble of thunder hinted that the rain was coming soon.

At the station, we stood quietly, side by side, as people bustled around us, rushing to catch their trains. I watched as Sensei glanced at the schedule board, her eyes briefly flicking in my direction. There was something she wanted to say, I could feel it, but the words hung in the air unspoken.

Finally, as the train approached, Sensei turned to me. “Yuuta—”

Her voice was drowned out by the loudspeaker announcing the train’s arrival. She paused, her lips pressing together as if reconsidering whatever it was she wanted to say. The train screeched to a stop in front of us, and Sensei shifted slightly, preparing to board.

I opened my mouth, but the words caught in my throat. Should I let her go? Should I say something?

“Sensei!” I called out suddenly, louder than I intended.

She stopped immediately, spinning around to face me. Her eyes locked onto mine, wide with surprise—and something else. It felt like she had been waiting for me to call her, as if she knew I would stop her at the last moment.

My heart pounded in my chest, but I couldn’t back out now. I took a deep breath and bowed deeply, the kind of formal bow that felt almost too serious for the situation. “Thank you… for last night. And for everything.”

I kept my head low, waiting for some kind of response, but by the time I lifted it, the train doors had already closed, and she was gone. I blinked at the space where she had stood, the sound of the departing train fading into the distance.

The silence around me felt heavy, but it didn’t last long. Slowly, I became aware of the people around me—dozens of eyes staring at me, a few muffled giggles breaking the stillness. I turned slightly, catching sight of a group of high school girls nearby, their faces red and their hands covering their mouths as they whispered to each other, clearly amused by the scene they had just witnessed.

I scratched the back of my neck, feeling the heat rise to my face. Well, that was embarrassing.

But despite the awkwardness of it all, I couldn’t help but feel a small sense of relief. At least I had managed to thank her properly, even if it was in front of a station full of people. Somehow, that made the weight in my chest feel a little lighter.

The first few drops of rain began to fall, and I looked up at the sky. It seemed like a storm was finally on its way.

I took the next train back to Suginami. It wasn’t far, just a few stops, but it felt like the ride was dragging on forever. The train rattled forward, the rain hitting the windows in steady streams, painting the world outside in shades of grey. I watched the droplets race down the glass, merging and breaking apart, and for a moment, I wished I could just disappear into the downpour, like them.

I kept replaying it in my head—what Haruka said that night. The words cut deeper than I’d thought they would. A part of me knew it was coming, but hearing it out loud was different. That doubt, the way she looked at me, as if I was some stranger who couldn’t meet her expectations. It felt like everything we had shared—the years together, the memories—didn’t mean anything anymore.

Did she ever really love me? Or had I just been someone to pass the time with, someone convenient? I couldn’t tell anymore. Maybe that’s what hurt the most. I couldn’t remember the last time she looked at me like she used to. Back when things were simple, before she moved to Tokyo, before everything started to change.

How much has she changed since she came here? Or… maybe I was the one who changed. I didn’t know. But somewhere along the line, we drifted apart.

I pulled out my phone, glancing down at the screen. The message I sent last night was still unread.

[We’re breaking up. I don’t want to see you anymore, Haruka.]

I didn’t even bother explaining. I couldn’t. What was the point? She didn’t deserve an explanation. Not after everything. She had made it clear what she thought of me—what she thought of us. I had given her enough chances, enough of myself. Now it was time to take back what I had left.

It might seem strange that I didn’t tell her why, that I just sent that message out of nowhere. But the truth is, she doesn’t owe me anything anymore. Not an apology, not an explanation. And I don’t owe her one either.

Not her, and not anyone.

I won’t let anyone control my life again. Not like that. Not ever.

***

[A/N: Oooh seems like there’s more to him than we think.]