Sailor Trinity, a beautiful girl warrior who protects the peace of the city by transforming with the power of Master Force, a legendary treasure handed down from the super ancient civilization Lemuria. Usually a female student at Higurugaoka Academy with excellent grades and chairman. One day, a mad scientist nicknamed Dr. Skull plots to steal the power of Master Force, the source of Trinity's power, and become an unmatched mask, disguising himself as a chemistry teacher at Higurugaoka Academy and approaching Trinity. And to use Trinity's younger brother to set a trap. Trinity, who has fallen into a trap, is deprived of energy and is humiliated by the endless sexual desire of a matchless mask... [BAD END]