Lin Hao unexpectedly finds himself reincarnated as a flea, bound to an infinite evolution system. After forming a contract with the school beauty, Feng Jiajia, he is mocked by everyone. Feeding on essence blood, he continuously transforms, evolving from a flea into the Moon-Devouring Star Beast. He helps the school beauty navigate the assessment dungeon and battle formidable foes in the Top Scholar’s Dungeon, stunning everyone at Great Xia Academy with his prowess. He tames the Crimson Blood Phoenix and ultimately joins forces with her to challenge the Supreme Academy, kicking off a legendary comeback story.