Shuten Momoko Can't Be Defeated Manga

A prophecy warns that, several years in the future, a single oni will destroy the Minamoto main family. Minamoto Yoriteru enters the demon realm to kill the oni called Shuten, setting out to find the realm’s strongest oni. In this world, strength determines everything, and only the powerful make the rules. Yoriteru hides both his own strength and his status as he searches for his target. But the oni he encounters is not what he expects…