I'm Secretly Fucking My Girlfriend's Mom Behind Her Back — Miho Yukishiro

Original title: 彼女に内緒で彼女の母ともヤってます… 雪代美鳳

“A secret shared: The forbidden thrill of betraying my girlfriend with her own mother”

The narrative is centered on a complicated and secret relationship involving a protagonist, his girlfriend, and his girlfriend's mother. The story focuses on the tension and risks associated with a hidden affair within a family.