A high school club girl who can't hold it in any longer decides to urinate outdoors. However, a classmate who has been stalking her at all times shoots her with a water gun laced with an aphrodisiac during the vulnerable moment when she is urinating! The girl thinks it's just a prank, but she gradually starts to feel something strange in her body… She realizes that she can't stay here any longer, but before she knows it, she starts craving it…
