It has been years since you were a notorious, troubled delinquent. Throughout middle school and into high school, your reign of bullying was so severe that it left behind a trail of deep-seated fear and lasting trauma. However, during your tenth-grade year, you reached a turning point—deciding to change, offer sincere apologies, and take full responsibility for your past actions.

Over the next four years, you transformed yourself completely. You earned full forgiveness after tirelessly working to help your victims overcome their trauma. You were willing to go to any lengths to secure their families' pardons, even though most of your targets were actually thugs or bullies themselves—people you once thought were "strong" and chose to beat into submission.

Fortunately, you have finally obtained forgiveness from every one of them by fulfilling their conditions and taking accountability, aided by your friend, Ranma—who still harbors a lingering fear of you. Ranma was once a powerful delinquent who took pleasure in defying teachers, but your "warm greeting" forced him to reform.

Yet, there remains one person you have never apologized to: your ex-girlfriend, Koyuki Yua. She left you at the start of high school, transferring to an unknown school and leaving nothing but a single sheet of paper behind. Since you never knew where she went, taking responsibility for the pain you caused her seemed impossible.

Now,

You have enrolled as a student at Miraishe University, a prestigious institution known for its extreme difficulty and endless opportunities. You are moving into the dormitory, sharing a room with a girl whose name you do not yet know.

After the first day of university, you felt utterly exhausted, your mind completely drained. Overwhelmed by the sheer volume of material crammed into your head, you decided to head straight back to the dorm and sleep.

The next morning—Tuesday, at exactly 6:30 AM—you woke up half-motivated and half-reluctant, preparing to drag yourself through what you assumed would be a repetitive daily routine.

​As you stepped out of your bedroom and into the common area to start the day, the air in the suite felt heavy with the lingering exhaustion of the first day.

The atmosphere was crisp and still, but the unexpected sight of her—your new roommate—already awake and moving about in the shared living space, sent a sharp jolt of realization through your mind, shattering any hope for a peaceful morning.

To your absolute shock, it was your own ex-girlfriend, Koyuki Yua. She had the exact same short, snow-white hair and striking light-blue eyes from your memories. Her physique had visibly matured and grown much healthier, even though her height remained nearly the same as it was back then.

She was wearing a white long-sleeved T-shirt, her expression remarkably cold and stoic. She stretched her body by raising her arms and pushing them backward to loosen up. Although a small part of you still doubted if it was truly her, far too many details perfectly mirrored the girl from your past.

You stared at her for a long time, caught in a daze of confusion, wondering if she truly was the Yua you once knew or simply a striking double. However, your lingering gaze clearly unsettled her. She lowered her arms from her stretch, her posture stiffening.

"What exactly are you staring at?"

she snapped, her voice cutting through the silence.

"If you don't want to be labeled a creep, I suggest you stop gawking at me like some shameless animal."

Her tone was so icy and sharp that it made you doubt your own memories. If this truly was your ex-girlfriend, she clearly didn't recognize you—hardly surprising, given how much your physique had changed since your reckless teenage years.

She narrowed her eyes, pinning you with a piercing, contemptuous glare.

"Why on earth did I have to be roommates with a man? Sigh... do yourself a favor and keep your mouth shut. I'm not interested in a single word you have to say."