Kazuki Haruka is an average teenager with a not-so-average mother whose moniker is known to the police as the 'Black Goat'. After his father died at the hands of his own mother, Kazuki has had an undying hatred for her. When his mother is executed, he vows to never become like his mother until one day he gets a sudden urge for bloodshed, he realizes that his vow may be broken after his struggle to control it begins to fail. This story follows him and his struggle to keep his urges in as his mother's presence emerges within him.

Kazuki Haruka is an average teenager with a not-so-average mother whose moniker is known to the police as the 'Black Goat'. After his father died at the hands of his own mother, Kazuki has had an undying hatred for her. When his mother is executed, he vows to never become like his mother until one day he gets a sudden urge for bloodshed, he realizes that his vow may be broken after his struggle to control it begins to fail. This story follows him and his struggle to keep his urges in as his mother's presence emerges within him.