Shouzou and Ine Saitou have been happily married for as long as they can remember. Even in their old age with wrinkles and cracking limbs, the strength of this love is evident in their precious bond. And then, one day, they wake up to find they are young again! Despite their newfound youthful and attractive bodies, Shouzou and Ine remain the same as ever.
You can now watch Grandpa and Grandma Turn Young Again online on the following streaming providers in the United States.
| Writing | Kagiri Araido | Comic Book |
| Directing | Masayoshi Nishida | Director |
| Writing | Yukie Sugawara | Series Composition |
| Sound | Tomoki Hasegawa | Music |
| Visual Effects | Nagisa Takahashi | Character Designer |
| Art | Chika Ishida | Art Direction |
| Sound | Nobuyuki Abe | Sound Director |
| Camera | Atsushi Tamura | Director of Photography |
| Production | Minoru Hirata | Producer |
| Visual Effects | Azusa Sasaki | Color Designer |
| Editing | Keisuke Yanagi | Editor |
| Sound | Koresawa | Theme Song Performance |
| Sound | Mamiko Noto | Theme Song Performance |
| Sound | Shin-ichiro Miki | Theme Song Performance |
| Production | Yukiko Fujiwara | Producer |
| Production | Minoru Hirata | Executive Producer |
