Promise 1

One day Akane arrives at Shinya's house and introduces herself as wife of Shogo, Shinya's step brother. Since Shogo is not very interested by women, Shinya wonders how they got together. Akane blames herself and Shinya wants to help her by giving her sex lessons. Shinya himself is not very experienced, but Sayumi comes to his aid and teaches Shinya some lusty techniques…