[KOGANE (Mizuhara Kou)] Ugokenai Imouto ni mo Seiyoku wa Aru

A brother discovers that his bedridden younger sister has desires of her own, and their incestuous bedroom encounter moves from awkward experimentation—his cock, her breasts, and her inability to move—to increasingly rough sex. Her dependence, his protectiveness, and the siblings’ charged teasing create a disturbing intimacy as tangled emotionally as it is physical. The ending jumps ahead a few weeks to reveal that the younger sister is pregnant; they say they will work it out together, then decide to try once more.