[TSF no F (NOMU)] Role-Change to Sister [Decensored]

A brother's longing for the ideal little sister takes an unexpected turn when an astrology club charm transforms him into that very dream girl, leaving him stunned by his new soft curves, swelling big breasts and unfamiliar feminine sensitivity. Instead of searching for a way back, the newly minted sister embraces her voluptuous body and turns to her flustered blood-related brother with a breathless proposal to experience sex as a girl, teasing and squeezing her assets to win him over. From hesitant touches to intense fingering, cunnilingus and a tender, clinging defloration, their forbidden closeness only deepens as she begs for another charm to keep them intimately bound together.