A high school senior named Yotaro thought he was an only child — until he met his real mother and discovered that she has 19 daughters, from 0 to 18 years old. He ends up living with his "true family."


Youtarou is a high school freshman, who, for a long time, believed himself to be an only child. However, after his only relative dies, he is taken into a family, and suddenly discovers that he is now the brother of 19 sisters, ranging from the eldest who is 18 years old, all the way to the youngest, who is 0 years old!


A high school senior named Yotaro thought he was an only child &mdash; until he met his real mother and discovered that she has 19 daughters, from 0 to 18 years old. He ends up living with his "true family."

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