Retribution · Vow of Vengeance Episode 1 / 2
After the sudden death of Professor Yuko, a kind teacher who was the only person to believe in them, Masayoshi suspects her fall from the school roof was not an accident. Driven by a desire for justice and swearing on his late father's handcuffs, Masayoshi begins an investigation into the school's dark underbelly of sexual manipulation to punish those responsible for the professor's death.
