De vier Yuzuki-broers – Hayato, Mikoto, Minato en de jonge Gakuto – verloren twee jaar geleden hun ouders en werken nu om zichzelf groot te brengen. Samen leven, leren, vechten en vergeven ze zoals broers dat zouden moeten doen.
| Directing | Mitsuru Hongo | Series Director |
| Sound | Yoshikazu Suo | Original Music Composer |
| Visual Effects | Orie Tanaka | Character Designer |
| Visual Effects | Orie Tanaka | Supervising Animation Director |
| Directing | Yoshiki Kawasaki | Series Director |
| Visual Effects | Masakazu Kawazoe | Layout Supervisor |
| Art | Hisao Onoi | Art Designer |
| Art | Kaede Aizawa | Prop Designer |
| Art | Yukihiro Shibutani | Art Direction |
| Visual Effects | Miho Tanaka | Color Designer |
| Camera | Satoshi Namiki | Director of Photography |
| Editing | Tomoki Nagasaka | Editor |
| Writing | Shizuki Fujisawa | Comic Book |
| Sound | Flumpool | Theme Song Performance |
| Costume & Make-Up | Kuro OI | Costume Design |
| Sound | Jirafa | Music Director |
