In a world where everyone has a monster crest since birth, only a select few rise up to become Monster Trainers. Reyn Erhardt, a slime trainer, the lowest of the low, cares nothing for status and just contin...

Yamada Tarou is living a regular life, until the death of the father he never sees catapults him into the role of the 13th King of the holy Phantasma kingdom. Now that he's king, Tarou has become the target ...