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