Private tutor Mayu makes a secret promise with her student Yuzuka, and as their bodies begin to touch, Mayu is drawn into a lesbian world. Their relationship transcends the boundaries of teacher and student, evolving into intense kissing and deeply intimate caresses. Lips and tongues entwine, and each time their bodies meet, their cunts become highly sensitive, sending waves of pleasure throughout their entire beings. Through relentless kissing and sensual touching, every part of their bodies transforms into erogenous zones. They climax again and again, overwhelmed by ecstasy as their bodies grow hotter with desire. Though they know it's wrong, they are powerless against the pleasure, unable to stop themselves. In this lesbian world, their bond grows ever deeper.