3x3 Eyes

Yakumo Fuuji is the main character of 3x3 Eyes, a young man who finds himself bound to a 3 Eyed demon through a complex series of events. The demon, whose soul is tied to Fuuji's, has become immortal after absorbing his soul to save his life. This leads to a complicated journey as Fuuji and the demon try to find a way for him to regain his humanity. Along the way, they face numerous challenges, including the demon's split personality and the romantic entanglements that arise.