もなみ、桐香、杏奈はひとつ屋根の下に暮らしています。

始まりは、大学生の桐香がいとこのもなみを引き取ったことでした。

小学生のもなみの面倒を見つつ学業をこなす桐香ですが、徐々に両立が難しくなっていきます。

状況を知った同級生の杏奈が、桐香の自宅に(強引に)押しかけ、三人は疑似家族として暮らし始めました。

Monami, Kirika, and Anna are living together.

It all started when Kirika, a university student, took in her cousin Monami.

Kirika takes care of her cousin Monami, who is in elementary school, and also does her schoolwork, but it gradually becomes difficult for her to balance both.

When Anna, a classmate of Kirika's, found out about the situation, she (forcibly) came to Kirika's house and the three of them started living as a pseudo-family.