[Nanasumi] Douka Suru Mono | Assimilator (Bessatsu Comic Unreal Bishoujo ni Gitai suru Igyou-tachi Vol. 1) [GTF]

A shy schoolboy named Fuyu‑kun returns home to find his older sister Akina, whose affectionate pats hide a growing, slime‑filled desire. As their bodies merge and his penis aches to erupt, the tension builds toward an inevitable, wet climax that promises complete assimilation. The story teases a surreal, erotic transformation where love and slime intertwine, leaving readers eager for the next page.