[Kanzume] Tobikkiri Junjou Sister [Colored Heroine]

Natsuki greets her exhausted brother at the door with a beaming smile and a tight sweater barely containing her enormous chest—but the second he steps inside, the doting little sister pins him down and rides his face, gushing while she coos about how he's been having bareback sex with her every night without even realizing. Her obsession spirals from smothering facesitting to desperate mating, squealing in ahegao bliss as she begs him to leave their genes behind, marry her, and pump a baby into her hairy, plush body. By the final page her hair hangs loose over a swollen pregnant belly as she bounces on him once more, giggling that their newborn daughter might grow up just as possessive of Onii-chan as her yandere mother is.