Ethan is unexpectedly reborn as a flea and bound to an Infinite Evolution System. After forming a pact with Fiona, he becomes the target of endless ridicule. Feeding on essence blood, he evolves without limit: from a mere flea into the star-devouring beast. He helps Fiona conquer trial realms, battle top foes in the champion’s secret domain, and stun all of Dawnrealm Academy with overwhelming strength. After subduing the Crimson Phoenix, the two join forces to challenge Crown Academy and begin a legendary rise against all odds.