The concept of reincarnation was interesting and new to me (in a manga), but they didn't dive into it very deeply, for example for 2 people to reincarnate in such a way, time and place for them to be able to be a couple again basically requires divine intervention, but then why was Yahiro so much younger ? did god have a plan or was it just the authors attempt to make it more interesting.
The annoying cliche of "i'm gonna make something for my boyfriend that i love so much by avoiding him for so long he will think i hate him and i'll break up with him" was also present, it's just so stupid and easily avoided, (just start knitting those gloves sooner, so you can work less hours a day and still have time to go home with your boyfriend), but that would not add as much drama, in fact it might be boring and not add anything, so you might as well just skip it, which proves that adding drama was the only reason it was in the story.
Anyway, there was far less romance than i expected (for a story about 4 couples getting together again) the endings could have been more satisfying, as usual important kisses are either obscured or don't even happen, i guess asians are into that sort of thing (with all the NTR stuff they put out). It's like buying the car of your dreams but never driving it, so it's still satisfying to look at but a car if made for driving.