After dying of heat stroke, a teacher named Takuro Shirai is told by a mysterious voice that if he can impregnate five women within a month, he will be able to continue living. When he is resurrected, his penis is modified to have a maximum libido and he can't stop getting aroused when he sees his students on the swimming team...!? Eventually, his reason breaks down, and he finally makes a move...! Is this a way to survive or just a sexual desire?