[Metako] Hitokui | Maneater (Bessatsu Comic Unreal Bishoujo ni Gitai suru Igyou-tachi Vol. 1)

A scientific researcher finds herself unable to resist the allure of a mysterious subject whose cells are dividing at a rapid pace. As the lines between human and monster blur, the subject begins a terrifying yet seductive transformation, mimicking the researcher's appearance to perfectly imitate her. What starts as a biological anomaly quickly turns into a predatory takeover, as the creature seeks to absorb not just the body, but the very soul of her target through a process of complete biological assimilation.