Haruka Nami, a detective from the Special Investigations Unit, goes undercover to solve a series of mysterious disappearances occurring within a school. As she closes in on the truth, she is suddenly attacked by otherworldly creatures known as tentacles. Despite her fierce resistance, she is overwhelmed by the pleasure-inducing slime secreted by the tentacles, gradually losing control of both mind and body. Unable to withstand the intense ecstasy, she accepts the alien creature's sperm, depicted in vivid detail as it ejaculates deep inside her vagina. Her beautiful yet increasingly deranged expression hints at a shocking new development.