クラスの優等生を『妹』にする約束をした。どうやらいっぱい甘えたいらしい。 (Associated Names)

When I ran away from home, I got a ‘little sister’, and she’s incredibly clingy. “――Please dote on me, Onii-chan!” Having run away from home due to a falling out with my father, I, Takato Ryuuki, was picked up by my classmate, Kakogawa Ao. The ‘contract’ that I made with Ao was… to become part…