Stealing Stars: 300 Heroes Arrive

He traveled through time and became the Demon King Ryusei, and he had a hero summoning system that was different from the ordinary summoning system. The host of the so-called hero summoning system could summon 300 heroes with their names, and then they would become gods or demon kings. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.