Shibararete Ageru

The story revolves around Kaori who has always been in love with a boy called Ryoichi. To her disdain, he ends up falling in love with her sister and the two of them get married. Kaori's feelings, however, remain the same and when, years later, the couple decides to file for divorce, Kaori sees her once in a lifetime chance coming. She offers to become Ryoichi's muse to inspire the artist's imagination, but soon the requests become daring. How far will Kaori go and what about Ryoichi's true feelings?