Fake Sister

Fake Sister summary:

The sensitive and pampered younger brother and an independent older sister who always takes care of people are both not biologically related to each other. But because of a promise to “take care of him”, she takes care of him as he grows up. <br><br>However, when the uncertainty of youth arises, he gradually starts to realize she is an irreplaceable person in his life… A story about the worries of a boy growing up as an adolescent.