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.
| Sound | Hiroshi Uesugi | Original Music Composer |
| Sound | Yasumasa Koyama | Sound Effects |
| Sound | Yui Horie | Theme Song Performance |
| Sound | Eri Kitamura | Theme Song Performance |
| Directing | Kei Oikawa | Assistant Director |
| Visual Effects | You Iwada | Color Designer |
| Visual Effects | Sari Tagawa | Color Designer |
| Editing | Daisuke Hiraki | Editor |
| Camera | Yasuhisa Kondo | Director of Photography |
| Sound | Yoshikazu Iwanami | Sound Director |
| Art | Toshihiro Kohama | Art Designer |
| Production | Shinya Shinozaki | Producer |
| Visual Effects | Yuka Nakajima | Character Designer |
| Writing | Naruhisa Arakawa | Series Composition |
| Writing | Tomohiro Matsu | Novel |
| Visual Effects | Takashi Mamezuka | Character Designer |
| Directing | Itsuro Kawasaki | Series Director |
