[Sanbalkin] Kunoichi Yotogi Shugyou ~Shugyou Aite wa Boku no Ani deshita~ [Full Color] [Kappasa]

A young kunoichi discovers too late that her assigned sex-training partner is none other than her older brother, who pins her stockings-clad legs wide open and breaks her in with ruthless precision. Tears streak her flushed cheeks as she begs him to stop, but his relentless pace keeps dragging her to climax after climax until an embarrassed confession to their father leaves the whole clan buzzing about her deflowering. The tension between forbidden desire, clan duty, and family betrayal turns every dripping, trembling page into a steamy lesson she never wanted to learn.