姊非姊

あらすじ

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. 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.