Keitarou Urashima, after failing the University of Tokyo entrance exams twice, moves to his grandmother's inn in Tokyo to prepare for his third try. To his surprise, the inn has transformed into the Hinata House, an all-girls dormitory. Despite a rocky start with the five skeptical female residents, his aunt Haruka Urashima, who works there, mistakenly labels him as a UTokyo student, leading the girls to warm up to him. As Keitarou grapples with this lie, he slowly forges bonds with his diverse neighbors: the feisty Naru Narusegawa, the sly Mitsune Konno, the gentle Shinobu Maehara, the disciplined Motoko Aoyama, and the playful Kaolla Su. Determined to enter UTokyo to fulfill a childhood promise and reunite with a long-lost connection, Keitarou navigates the challenges of academia and relationships in his quest for love and success.