Yuuta has invited the members of his club to dinner at his home to meet his nieces. Shuntarou is overwhelmed by Miu and Hina, while Raika is smitten with Sora. Life with Yuuta and the girls have become routine, and what to do about the upcoming school term was the next family problem. But a visit from the Landlord has changed everything.
Segawa Yuta is a freshman of a university. He lost his parents when he was small and was raised by his sister Yuri. Yuta has been living alone since Yuri got married to a middle aged man when Yuta was a junior high student. One day, Yuri visited Yuta's apartment and asked him to take care of her three daughters while Yuri and her husband were on a trip. He unwillingly accepted the job but the plane Yuri took went missing. In order to prevent the daughters from being adopted separately by relatives, Yuta decided to take in all three girls. A life of a strange family in a tiny apartment begins.
