[Itaba Hiroshi] Sisterly Nature Ch.1 [Black Grimoires] [Decensored]

Two curvaceous sisters find themselves drawn into the same bed with their younger brother, Kazuma-kun, after a sleepless night of listening to his pleasures next door turns into an irresistible invitation. Nee-chan, the bespectacled older sibling, watches with flushed curiosity as her younger sister eagerly takes him in her mouth and welcomes his seed, the warmth and closeness of the moment pulling them all deeper into taboo intimacy. With every shy glance and breathless confession, the boundaries between familial affection and raw desire blur in this slow-burning chapter of shared, unspoken longing.