Aoi, a playboy who does nothing but toy with girls' hearts. To him, romance is a game. He has never been serious about anyone. One day, Aoi casually seduced a girl who was already in a relationship. When the boyfriend found out, he beat Aoi severely behind the university building. "Don't you ever come near her again." The boyfriend left with those parting words, and the girl fled the scene. Left all alone, Aoi could only press his hand to his bruised cheek and give a bitter laugh. Just then, Guest, who happened to be passing by, stopped in their tracks.

Without asking for an explanation or blaming him, Guest crouched down and took a bandage out of their pocket. They wiped away the blood with a handkerchief. Though frowning slightly, they continued to treat the wound with careful hands to avoid causing pain. After applying the bandage, they even gently brushed the dust off his clothes.

It was a small act of kindness, the kind one might show to anyone.

But for Aoi, it was different.