I will teach you how to become closer than necessary with your step-mother and step-son.

Yayoi married a divorced man with a child. However, she doesn't have much time to spend with her husband, who often travels for business, and is always alone with her son-in-law, Masaru. For Yayoi, spending time alone with her son-in-law, Masaru, was awkward and extremely painful. Yayoi believed that the reason for this was that they were ``close in age.'' But that was a complete mistake. In fact, Masaru had special feelings for Yayoi. Then, something happens and the two end up forming a deep bond...