My name is Miyabi Mifu. I'm a lonely sixth-grader, and I don't have any parents or relatives.....or so I thought for the last twelve years! One day, I found out I'm a quadruplet!! Three other girls that have the same face and voice: Ichika-chan, Nitori-chan, and Shizuki-chan. We were all raised alone in different places, but from now on we're going to be living under the same roof. However, living with only other children is chaos! Also, the differences in our upbringing could lead to some uexpected circumstances...? We're all the same, but we're also different! Our cute sisterhood life begins now!