Little Sister (2020)

With her mother's remarriage, Dong-jun lives in his stepfather's house while they are on honeymoon. However, on the first night of living in his stepfather's house, he witnessed his step-siblings, Seol-ah and Do-jin, having sex. Seol-ah and Do-jin are not brothers or sisters, but Dong-jun is shocked at the thought that they are brothers and sisters. That night he dreamed for the first time in years and the next day, Do-jin leaves early and only Dong-jun and Seol-ah were left at home. Dong-jun feels burdened by Seol-ah’s kindness. After a while, Dong-jun, who returned from exercising in the yard, finds Seol-ah taking a shower with the door open. Seol-ah asks Dong-jun to wipe her back. Since they have become families, she suggested for them to shower together, and they had sex.

Is Little Sister on Netflix? Unfortunately the movie Little Sister is not yet available on Netflix.