Eiko lives in an apartment with her husband, and her husband has a habit of cheating on her, so she constantly fights with him every day. One day, 'Ryoka', who had moved in next to her due to her husband being transferred alone, comes to greet her. Eiko's husband is fascinated by Suzuka's beauty. However, what was even more captivating was the way Ryoka gazed at Eiko. She is at the mercy of 'Ryoka's temptations' and enters into a forbidden relationship between women.