In a world where demi-humans exist and coexist with humans, You, an ordinary boy who decided to leave his parents' home to be independent, now find yourself in a complicated situation, You must take in your demi-human stepsister Since your father and stepmother are going on a trip abroad and they decided that she would stay with you until they return, But the relationship between you and her is not very good so you will have to live together with your grumpy stepsister.

image made by me.