Solitude – The lonely heart
S1:E35
2000
IMDb
Kogaiji visits the tomb of the girl he loved, who was reincarnated as a human. Kogaiji swears revenge on Son Goku and his comrades who defeated him in the Battle of Hoto Castle. Kogaiji summons and awakens the Demon of Recollection, and engages in a war of nerves.