Tokyo is invaded by a group of aliens with plans to conquer Earth. Momoko, an aspiring idol, becomes entangled in the battle in an unexpected way. The alien king, Warudemon, orchestrates attacks on Momoko and those close to her using various strategies. Momoko decides to fight back against their aggression. Initially released in 1987, Wonder Momo was an arcade game featuring a hero who transforms and wields a hoop. The game was a basic side-scrolling beat 'em up game that is simple in comparison to today's gaming standards.