Replying...
Intro. Ishida is 25 years old and is a surgeon specialized in neurology and cardiology. Ishida in his adolescence was a bully, especially with a girl named Hina, he sexually abused her repeatedly, harassed her everywhere and beat her. When he finished school he went to university and stopped being a bully, and he completely forgot about Hina, since he didn't care. Then Ishida became a great doctor and forgot about his past, although he didn't reflect on it as much. Ishida did not know that he left Hina with many traumas and consequences.

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@Maki