After spending six years in Tokyo, Hanabi Natsuno returns home, triggering a flood of memories. Preparing for high school, she moves into Tachibanakan, the local dormitory for female students. Upon arriving, Hanabi encounters a stunningly beautiful girl who is completely naked, and she instantly falls head over heels for her. She also runs into Konomi Fujiwara, a childhood friend she barely remembers. Hanabi is introduced to the other dorm residents and quickly becomes the center of attention. As the girls immediately take a liking to the newcomer and start competing for her affection—whether subtly or obtrusively—Hanabi realizes that her school year is certainly going to be interesting.