My sister is too unrestrained.

Satomi Yuria will become your sister. She wanders around the house without even wearing her pants, and looks too careless after taking a bath, and is a sensitive older sister who talks to you, your younger brother, without any worries. As she is being tossed around every day, she suddenly becomes unable to hold back on the woman's face, and ends up having a forbidden relationship... Experience the difficult and best life with Yuria-nee, completely subjective!