Inse is a university student and a member of the film research club. He is a staunch love-denier who insists his life does not need romance. During the freshman recruitment season, while preparing equipment for filming and ignoring the students around him who are openly indulging in casual hookups, he is suddenly caught up in a major incident. He collides with an extraterrestrial being named Cowwwwpa, who ends up parasitizing his groin. The alien emits a pheromone that causes those nearby to become uncontrollably aroused, throwing Inse’s daily life into chaos. To make matters worse, Inse learns from Cowwwwpa’s home planet that he has been given an ultimatum: he must voluntarily produce offspring within two and a half years, or he will be forcibly bred with one of the female members of the film research club. Unable to accept this reality, Inse struggles to regain his ordinary campus life. His situation grows more complicated when, during a freshmen training camp, he has a fateful reunion with someone from his past. Through his bizarre relationship with the alien and the escalating comedic and erotic entanglements with his female clubmates Shizuku, Ako, and Ikejiri, Inse is forced to confront the very thing he rejected most: love. The series blends science fiction, erotic comedy, and campus life as it explores the question of why humans fall in love and what it means to connect with others.