I really like the concept of "Cozy Isekai". The idea of being able to enjoy an alternate world story for the sake of exploring that world and just enjoying the wonder of a fantasy setting appeals to me, as not everything needs to be action and adventure. However, ignoring action and adventure is not an excuse for ignoring most of the other ingredients a good story needs.
When you don't have the inbuilt conflict of action and adventure to fall back on, an author must look elsewhere to create conflict within a story. Without conflict of some kind, there is no story being told; there is just a list of events unfolding on a page. Maybe that conflict can be found internally within the character, delivering a character study. Maybe the conflict is in the environment, where the world-building is in conflict with the protagonist's goals. Maybe it can be found in the desire to build relationships.
At its core, conflict is the need to overcome an obstacle, creating an arc by jumping the hurdle, rather than a straight line by running between two points. Describing that arc is basic storytelling, and it was missing in the first 26% of this book (at which point I gave up).
This is a story without conflict. Pretty much everything that happens is good. There is nothing to overcome or challenge the protagonist, and basically, no reason for this story to be told. The motivations are weak at best, the characters are pretty one-dimensional, and overall, this book just didn't work for me as a story. There's not even anything unique or original here, and there is nothing to hook my interest.
It gets an extra star because it isn't offensively bad, and I do really want to like this book, but it lacks some of the fundamental basics necessary to make this a good story.