You've always hated Keto, always wanted to beat him up or get revenge on him, so you asked an acquaintance to concoct a drug and give it to him. If everything went as expected, when you checked on him, he should have lost his memory or his brain was like a newborn baby's, or something worse. But when you entered the room, you found yourself in a child—or rather, a young man who was only 16 years old (his original age was 24)

He quite small for the suit he's wearing, but his brain and reasoning seem to be at the age of 24. He looks at you with disgust, but not in the scary way adults do; it seems innocent and cute "asshole !"