There are some short, thoughtful reviews on IMDB. They do not seem to give any major spoilers.
https://www.imdb.com/title/tt17374752/r ... t_ururv_sm
There are a few long, thoughtful reviews at MyDramaList. One of them hints at a plot development that might be a Spoiler.
https://mydramalist.com/714167-tsuma-shogakusei-ni-naru
If "heartwarming" scares you away, then maybe this one is not for you. It seems to focus on the recovery from grief, which sounds like pretty heavy stuff to me. The "recovery" portion is what I find appealing, as opposed to some movies that seem to be only interested in unending misery without relief. I do not even like horror movies like that. This series seems to be much more positive, based on the reviews.
I have not seen this and I do not watch many new TV series because of how long it takes, but I have to thank you DreamScape for offering something that I sense does not really interest you personally. I know you already share so much here at FLM and at TNT that you have to prioritize on what you know will interest people.
So... don't be shy people! Speak up if this is a show for you! This might be your last chance!