While Anon the human is trying to study for his college entrance exams, his little sister Flurry Heart is trying everything that she can to make her big brother hang out with her.
After seeing his father die in front of his eyes by a griffon, a ronin named Aka Kabuto vows to dedicate his life to avenge his father and regain his honor and learns to forgiveness himself and how revenge can cloud one's judgement.