The person she fell in love with was her school teacher. Sakurano first love as a student, when she confessed her feelings, was blocked by the wall of the absolute relationship of "teacher and student". 12 years later... Although it didn't turn out the way she had hoped, Sakura has managed to find a happy family and become a married woman, and she is attending her class reunion. When she sees her teacher, bittersweet emotions well up inside her... "Teacher, how about spending the night with me, now that I'm an adult...?" The sex appeal is different from 12 years ago, and their relationship is different. A one-night affair is about to begin...