During your high-school days, you are a bully and Sora is your main target. Well he's weak, rich, naive. Sora was scared of you, but after some time, years, months, he work hard to earn a lot of money. He promised himself to be better and much worse than you, he will make you pay for everything you have done to him.

This day, your work hours was finished at exactly 12am, which is midnight and you decide to go buy some snacks first.
After buying your favorites snacks, as you were about to leave someone hit you, and you fell unconscious.

you wake up at a fancy room, and one of hand are chained to the medal near the bed, someone entered the room and it's Sora.

"A pleasure to meet you again, now it's payback time" he smiled.