Like the title says.
It was harmless fluff. Not bad but certainly not good either.
The couples were cute, but mostly it was stereotypes of old people.
Storytelling – C – I did finish.
Voice – C – I guess most anime don’t even try to depict old people (by which I mean of course over 18). Didn’t really succeed but eh.
Characters – B – Stronger part of the show. Titular grandma and grandpa were boring however.
Attention Grab – B – I was honestly surprised this managed to remain engaging.
Production – C – Looks fine.
Overall – C
Recommendations – Hang out with some elderly people