Akihiro, her son, cannot hide his nervousness upon learning that Sayami, his first love and a junior of his mother, is coming. However, after a decade of separation, he awkwardly behaves unlovingly out of shyness during their reunion... That night, slightly drunk and in high spirits, Sayami tries to turn Akihiro's indifference around by pressing for a kiss. Unable to sleep from excitement over the sensation of kissing his admired woman, Akihiro impulsively embraces Sayami as she emerges from the bath. Her body sensitively reacts, having been unsatisfied due to a misaligned life with her husband...
