Class No Yutosei Wo "Imoto" Ni Suru Yakusoku Wo Shita. Doyara Ippai Amaetairashi. (Fujimi Fantasia Bunko) [Light Novel]

[Machine Translation] Ao Kakogawa, a classmate of mine, picked me up after I ran away from home due to a disagreement with my father. The "contract" I made with Ao was... to become her family and live together! To become her family and live together? I was like, "Oh brother, there's no one here. Let me recharge my batteries! Ao'o is an honor student at school, but at home she spoils me, her "brother"! Ao's younger sister, Kizuna, who is usually so languid but really wants to be taller than her brother, is also Ao's cousin. Ao's cousin Yukari is also a popular teacher at school. The three beautiful sisters of the Kakogawa family are gradually getting more and more affection from each other... It's a strange relationship, but it's always exciting and fun! Becoming a "family", love begins. A heartwarming cohabitation romantic comedy!

父との不仲で家出した俺、鷹戸流稀を拾ったのは、同級生の加古川青緒だった。そんな青緒と俺が交わした『契約』は...彼女の家族になって、一緒に暮らすこと!?「お兄ちゃん。誰もいないから、充電さーせてっ!」学校では優等生の青緒が、家では『兄』の俺にめちゃくちゃ甘えてくる!?さらに、いつもは気だるげだけど本当は背伸びしたい青緒の妹・絆菜。青緒の従姉で学校でも人気の先生・ゆかり。加古川家の美少女三姉妹から、徐々に可愛がられて...不思議な関係だけど、毎日ドキドキと楽しいことばかり!?『家族』になって、恋が始まる。ハートフル同居ラブコメ!