Takeshi Toshimido is a shy and timid herbivorous high school boy, but he has a tremendous sexual desire and is extremely erotic. A holy angel, Perroel, comes from the heavens to Takeshi. She has a mission to "recover libido by kissing girls and prevent Japan's declining birthrate", and she chose Takeshi as a pawn for that purpose. Takeshi is immediately taken to the night town to hunt for his libido . Kiss a girl and make her mellow. In this way, Takeshi became Perroel's servant "Libido Hunter", and the days of hunting libido with kisses from girls began.