Five female fighters called ”Fi-Buster” have a mysterious power, ”Fi-Energy”. They must overcome the biggest crisis ever by fighting the Gigantica Empire who is trying to control the Earth.

The story of a teenage boy called Yu, who falls for Yoko, a girl he runs into while working as an upskirt photographer in an offshoot of the porn industry. His attempts to woo her are complicated by a spot of cross-dressing – which convinces Yoko that she is lesbian – dalliances with kung-fu and crime, and a constant struggle with Catholic guilt.