Original work on Pixiv

After his parents' divorce, Ryousuke's mother always comes home drunk. Afraid of some man taking advantage of her because of that, he decides to become his mother's man.

A collection of short stories: 1-5. Mother and Younger Sister Yudzuki had beautiful mother. During his free time, he keep masturbate using his mother as material at night. Due to this, his score in exam was...