Premieres April 7th. The new PV is here. Check out the ANN article for additional cast/staff information. Synopsis from AniList:
The story of Jii-san Baa-san Wakagaeru follows Shouzou and Ine, an elderly couple who are living a quiet life in a farming village in Aomori Prefecture. After eating a mysterious apple that they discover on their apple farm, Shozo and Ine spontaneously regain their youth, but even after being reinvigorated they continue to live life at a grandparent-ly pace.
I wasn’t expecting it either. Now I’m mildly excited - I’m not a fan of SoL but the manga series stands out for me, it’s really good.
You guys have sold me on this!
Given Japan’s older demographics trends, anime and manga targeted to older audiences shouldn’t be a surprise.