This title falls into the "Milf" and "Student-Teacher" sub-genres, which are common tropes in adult Japanese media. The plot typically centers on a protagonist—often a student or a young teacher—who becomes involved in a secret, illicit relationship with the mother of one of their peers or students. Adult (Hentai/Smut), Romance, Drama.
Kaito had always been a bit uneasy about his family situation. His father had remarried not long after his mother's passing, and while his new stepmother, Mama Kano, was kind and welcoming, Kaito couldn't shake off the feeling of awkwardness. She was younger than his father, with a vivacity and charm that made Kaito's friends love her, but he just didn't know how to react. Mama x Kano -Oshiego no Okaa-san ga Ecchi na Se...