Grandpa and Grandma Turn Young Again - Season 1 - Eps 4: Grandpa and Grandma and the Culture Festival
At Mino's invitation, Shouzou and Ine decide to go to the culture festival at her school. Once there, an accident causes Ine to have to change clothes. When she puts on a sailor-style school uniform, she reverts to mannerisms she used in her school days.
About Grandpa and Grandma Turn Young Again

Title: Grandpa and Grandma Turn Young Again
First Air Date: 2024-04-07
Last Air Date: 2024-06-16
Status: Ended
Rating: 7.2/10 (from 16 votes)
Language: JA
Seasons: 1
Total Episodes: 11
Network: AT-X
Genres: Animation, Comedy, Family
Production Companies: GEKKOU Production, KADOKAWA, Nippon Columbia, AT-X
Synopsis
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.
Cast

Shin-ichiro Miki
Shouzou (voice)

Mamiko Noto
Ine (voice)

Shiori Mikami
Mino (voice)

Nao Toyama
Shiori (voice)