TimVic
i don't think he should kill his parents, no matter what, they are still his parents who gave birth to him and let him study till graduation. he should just move on from past think that it was just is bad luck to have such parents. as for his brother, he could just steal his bloodline if he becomes too much. killing parents and brother just because they're annoyance, when he could just ignore them as they're obviously weak side characters to him, will just show that he has not gotten over his past and would never be able to.