元不良の男だけど今は真面目な女の子ですから！ (Associated Names)

I was a former delinquent, but when I entered high school I got serious. My grades aren’t good, but my behaviour is adequate. I have 0 friends because of my face and a rumour. One day, I received a nutritional supplement drink from my younger sister, so I drank it at school. Then, my body…