Yuuta awakens to find Sora hugging him. She starts screaming when she finally awakens. Yuuta leaves the three girls in his apartment with an instruction never to leave home and never answering the door. Yuuta was later ambushed by Raika and the rest of the Sightseeing Club for him not visiting them in awhile. Meanwhile, the girls had to do something, given the rather huge bill for their breakfast. They tidy the room, head to the laundry shop, and shop for vegetables for dinner, though Hina starts writing on the wall with permanent pens and making dinner being a disaster. Though Yuuta, coming home late, gets upset with what happened, his being upset is replaced by happiness, because he understands the thought of all of it counts.
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.
