The Oshima family lives together with their daughter and her husband. After Kazuya, the son-in-law, changes jobs to become a cleaner, his daily schedule becomes completely different from the rest of the family. Yuka, his mother-in-law, supports Kazuya with an all-encompassing kindness. Despite knowing she is his wife's mother, Kazuya gradually finds himself attracted to her. When they discover that both of their marriages are sexless, Kazuya can no longer hold back and pushes Yuka down. Even though she knows he is her son-in-law, her pleasure-starved body regains its moisture, swallowing his cock deep inside her pussy...
