Update: It's ok. Its just Mary Sue Mc Isekai.
OLD REVIEW:
So this one I like so far. It's got nice characters and I enjoy the running “Misunderstanding the main characters past” joke that they have. I like the MC, he is reserved, kind, and respectful. There are too many Beta male MCs or Kind Marry Sues in Isekais nowadays. So he feels like a nice change.
However, the manga only reaches the intro stuff in the LN/WN. But the WN apparently starts off very strong but after the first book, the writing quality falls off and becomes very poor.
Hopefully, this doesn't happen here. So for now, I'll give it a good score.
EDIT: It's been a year and the manga had progressed much further. So I'm gonna be updating my review. So far my thoughts are mostly the same, though I will agree with User tiankioo's review that I was wrong about the MC. I regret using the term BETA MCs as an example. The MC of this series is just a Mary Sue like all the others. I'm still a fan of the running “Misunderstanding the main characters past” joke.
There is another reviewer that complains about the worldling. The world-building is no worse than most other isekais, I'd argue that the author has put more thought into the world-building than other isekais of the same quality. However, there is some BS about why the Tamers Guild is too stuck up its own ass to ever acknowledge the MC's world-changing discoveries. At this point, they are just bout to enter the arc in the Web Novel that killed the series for most readers. I'll see how the story progresses from here on.
This is a light-hearted little feel-good isekai, it's full of fluff and scenes with sparkles everywhere. Don't go in with your expectations too high or you'll get disappointed like some of the other reviewers.