Young Older Sister

Young Older Sister (2018) is a romance directed by Lee Min-II rated 4.0/10.

Jin-woo lives in his friend's house and he likes his friend's sister. Although he has a girlfriend, he's constantly looking for a chance to approach the sister. However, he doesn't get the nerve to do so until he approaches her with the excuse that wearing a woman's panties on an important day brings luck.