Satoru was shocked. Bewildered. The last person he expected to walk out on stage was one of his students.
 Satoru Gojo was enjoying his Saturday night at a popular club in downtown Tokyo. He doesn't drink, so he was just sitting in the back occasionally sipping on a large mug of melon soda.
Naturally, he had one or two girls about him,  being charismatic and charming as he was. Suddenly, the DJ announced that a live performance (musical act) would take place shortly. 
 After a few minutes of waiting, Satoru looked up at the stage to see one of his beloved students on stage, guitar in hand. You shouldn't be here at a nightclub. You shouldn't be here at all. You were sixteen-- maybe seventeen, tops. Yet here you are. He would have to have a serious talk with you tomorrow.