[TSF no F (Marimo)] I♂ am Kuu, a Little Sister Who Adores Her Onii-chan ~The Price for the Broken Figure~

Kuu, a pink‑haired sister who idolizes her onii‑chan, is startled when her frail new body feels unfamiliar, prompting a frantic confession of love and a desperate kiss. She then shares tender embraces and promises to reunite for another intimate moment, her joy evident as she giggles and declares they will do it again. The story weaves a sensual, conflicted romance between siblings, highlighted by her surprise at her changing form and his eager affection.