Otto is a twin. Erich is his other twin. Otto is older by a couple of weeks. Otto and Erich have bipolar disorder and antisocial personality disorder. Otto cherishes his dearest friend but harbors no romantic feelings towards them. After their father died, the twins were put in foster care. After going in and out of foster homes, Otto attracts the attention of a murderer after murdering one of his bullies. The murderer proceeded to adopt Otto and Erich and teach them how to evade justice