RBK-133 — A class reunion affair: Missing the last train, I found myself alone with my former teacher, whom I had a crush on back then. A one-night stand of adultery, where we devoured each other's bodies.

Ayaharu lives a peaceful, albeit ordinary, life with her kind husband and adorable son. However, the couple eventually became a 'family,' and she was no longer seen as a woman. Around that time, I received a notice about a class reunion. Ayaharu reunites with her former teacher, Kida, whom she had a crush on during her high school days, after 20 years. My first love ended without me ever telling him, but I could never forget his gaze. Though a little older, my beloved teacher remains unchanged from back then, and time begins to move again in his presence... The two, no longer teacher and student, are swept away by irresistible feelings.