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