Description

DESCRIPTION:
10 Days with My Bratty Stepsister drops you into a cramped apartment and a countdown clock: your parents have arranged for your stepsister Nanaka to stay with you for ten days, and the sweet kid who once clung to your arm has been replaced by a sharp-tongued stranger who wants nothing to do with you. Frustrated by her attitude but increasingly distracted by her figure, you finally make your move late one night—and the ten-day clock starts ticking in a very different direction.

This completed Japanese adult visual novel from developer Osawari Honpo (おさわり本舗) blends slow-burn tension with explicit payoff. Expect 2DCG art, big tits, groping, ahegao expressions, and creampie scenes as the incest-flavored story pushes the step-sibling dynamic into taboo territory across branching, choice-driven days.

Version 1.0.0 runs on Windows and is mosaic-censored, with text in English, Japanese, Korean, and Simplified Chinese paired with full Japanese voice acting. Originally released as なまいき義妹とヒミツの10日間 (Namaiki Gimi to Himitsu no 10-nichikan), it’s available through DLsite—so grab your copy, start the countdown, and see how far ten days can take you.