Haruka and Wakana have to don their bikinis
Eiko has an unsatisfying relationship, and finds fulfillment inside the arms on the more youthful Mitsuo. After a passionate spell between them, Eiko feels she will be able to't retain residing using this method and breaks up with him. Two a long time later, Eiko's young sister, Yuiko is happily engaged to marry, and introduces her fiance to Eiko.