The apartment is home to 21 single men, all without girlfriends—shy, insecure young men burdened by their own complexes. Akari Mitani becomes the temporary caretaker for just one day, offering them assistance. The men, nervous from their first real contact with a woman in a long time, gradually gain courage as they're enveloped by Akari's warmth and kindness. She listens to their troubles and carefully supports each one with personalized sexual experiences. For the male masochists, she delivers firm dominant treatment, making sure they're thoroughly satisfied. In the end, regardless of small penis size or unusual fetishes, everyone joins in a massive group orgy. The story concludes with all problems resolved as each man cums inside "Akarin's pussy" with a bareback creampie.