Infidelity between same-sex partners... Its depths are known to no one. Madoka Nakajima and Juri Fukada are two female teachers working as colleagues at the same school. Juri, a true lesbian, and Madoka, a bisexual, have secretly fallen into a deep homosexual relationship. Madoka, who has a husband and child, cannot hide her affairs with men, but believes that with a female partner, no one will notice. With this in mind, the two lie their way to a two-day, one-night trip. On their first overnight stay, their forbidden relationship deepens even further.

Hitomi, the third daughter of the Honda family, has set her sights on Rumi, the young maid they hired. While her father is away, Hitomi reveals her true nature and begins to relentlessly pester Rumi. "Have you lost your virginity yet?", "Aren't you fucking around with guys all the time?". Hitomi is puzzled by Rumi's strangely fearless demeanor. "Are you a lesbian?". "I'm not, but with you, Hitomi-san, it would be okay". In that moment, their eyes meet, and soon they begin to intertwine their tongues. Then, a week later, Hitomi returns home bringing an older woman with her named Maiko Miyazawa...