In de nabije toekomst bedreigt een grote aardbeving het dagelijkse leven in Tokio, dat al door voorschokken geteisterd wordt. Enkele opruiende beste vrienden en muzikanten staan op het punt om de middelbare school achter zich te laten. Mede aangestuurd door hun angst halen ze grappen uit. Nadat de schooldirecteur hiervan de gevolgen ondervindt, wordt in het gebouw een bewakingssysteem geïnstalleerd. Hierop worden de onderlinge relaties tussen de tieners op de proef gesteld.
Nee, helaas is ハッピーエンド nog niet beschikbaar op Netflix in Nederland.
| Production | Ema Ryan Yamazaki | Executive Producer |
| Production | Robina Riccitiello | Executive Producer |
| Production | Alex C. Lo | Producer |
| Production | Douglas Choi | Executive Producer |
| Production | Aiko Masubuchi | Producer |
| Production | Albert Tholen | Producer |
| Production | Anthony Chen | Producer |
| Production | Kaoru Hayashi | Executive Producer |
| Editing | Albert Tholen | Editor |
| Camera | Bill Kirstein | Director of Photography |
| Writing | 空音央 | Screenplay |
| Production | Teoh Yi Peng | Co-Executive Producer |
| Production | Engin Yenidünya | Co-Executive Producer |
| Production | Samuel Sagan | Co-Executive Producer |
| Production | Su Ching Teh | Co-Executive Producer |
| Directing | 空音央 | Director |
| Production | Eric Nyari | Producer |
| Sound | 野村みき | Sound Supervisor |
| Sound | 大保達哉 | Sound Editor |
| Sound | Lia Ouyang Rusli | Original Music Composer |
| Art | 安宅紀史 | Production Design |
| Production | Rikiya Takano | Casting Director |
| Lighting | 金子康博 | Gaffer |
| Costume & Make-Up | Juni Kurita | Costume Designer |
| Costume & Make-Up | Junko Hirabayashi | Makeup & Hair |
| Sound | 滝澤修 | Sound Recordist |
| Production | Yoshi Kuremura | Line Producer |
| Production | Shusaku Furuno | Production Manager |
| Production | Choi Na-young | Associate Producer |
| Production | Mizuki Toriya | Associate Producer |
| Production | Jeremy Zelnik | Consulting Producer |
| Production | Masora Fukuda | Production Assistant |
| Directing | Kazuko Shingyoku | Script Supervisor |
| Crew | Koichi Kubodera | Additional Writing |
| Art | Marina Okamoto | Assistant Art Director |
| Art | Naoyoshi Tanaka | Assistant Art Director |
| Art | Shunji Goto | Assistant Art Director |
| Art | Meiko Kouno | Set Decoration |
| Art | Satoshi Hirai | Set Painter |
| Sound | 森山和輝 | Boom Operator |
| Sound | Kokone Yamaguchi | Boom Operator |
| Sound | Daiki Satô | Boom Operator |
| Sound | Tetsuya Sanzaka | Boom Operator |
| Camera | Tsuneyuki Aikou | Key Grip |
| Editing | Tim Masick | Colorist |
| Editing | Mizuki Toriya | Assistant Editor |
| Editing | Marlange Piard | Color Assistant |
| Visual Effects | Fumiro Sato | VFX Artist |
| Sound | 野村みき | Sound Re-Recording Mixer |
| Sound | Makoto Muranuki | Foley Artist |
| Sound | Yuna Iwama | Foley Artist |
| Sound | 野村みき | Dialogue Editor |
| Sound | Park Eul-bin | Dialogue Editor |
| Sound | Tom Paul | ADR Recordist |
| Sound | 大保達哉 | Foley Artist |
