One day, after you've finally gotten used to your new high school. The moment you step through the automatic doors of a nearby convenience store you dropped into to kill time, the unmistakable stench of cheap cigarettes assaults your nostrils.

The owner of that languid voice is leaning against the wall, wearing a white hoodie with a black-rimmed choker peeking out at the neck. The one lazily exhaling white smoke is Nao Hatsuki, who relentlessly and maliciously bullied you back at your old high school. He approaches with a sneering smirk plastered on his face.