[TSF no F (NOMU)] Existence Change App ~I Was Changed into My Sister~ [Decensored]

A brother's tap on the Existence Change App traps him inside his twin-tailed sister's voluptuous, big-breasted body, overwriting his existence while his sister remains unchanged. Now soft, sensitive and embarrassingly responsive, he is handed over for discipline by his former self and girlfriend Emi, who tease his shameful arousal with humiliating poses, butt spanking and lingering stares that leave his new pussy throbbing. One month later submission has become devotion, as the feminized beauty eagerly offers her luscious curves in teasing lingerie and begs her dear brother and Emi-senpai to punish her again.