spoiler!!!!!!
so the bottom and the top went to high school together and basically the top confessed his feelings to the bottom and somehow the bottom gangraped the top and filmed it and sent the video to the top‘s mom hence that’s why the mom went crazy and had to be institutionalized. i forgot what happened afterwards exactly but the bottom was a delinquent (duh) got into a fight where he lost his memories. the top visited him in the hospital and asked what would you do if someone did bad thing to him and the bottom answered he would do anything to get revenge… and that answer fueled the top‘s ambition to get revenge. it‘s not a romantic story and doesnt have happy ending either

I also want to know what he did first.. maybe in High school.. what i understand so far.. or may e bully