The harassment from Alfine ー his girlfriend and childhood friend ー who is the same age, grew up with him, and became adventurers together, is painful. She is a peerless beauty known as the "Flawless Sword Goddess" and has the title "Sword Master." Her achievements were recognized by the kingdom as a knight and gained a noble title. On the other hand, he is treated as Alfine’s verbally abused accessory and suffers from her harsh harassment, resulting in him losing his dignity. He has resigned himself to spending his daily life in the position of a lover-cum-caretaker. However, a change came to that daily life!
Ehh. There are times when it's up and times where it's down. The main character is too dense for his own being. But has an interesting premise with the backstory. So if the author fixes his dense ness and forced romance. The story would be great. All of the characters seem to be well developed with a story behind them. Though I can't really say much since there are only a couple chapters. I'll have to see in The future chapters which route the author decides to take.
TLDR: If you like fantasy/isikai world but with a twist, you will enjoy this. Especially if your those who like reading those independently small-time light novels that turn into mid-tier (in production value) level content. Here is the thing. These days there is a lot of fantasy manga, web novels, anime and more. Because of this is has become common practice to add a unique element to your fantasy to make it stand out, like a person who can only do healing magic, or a veterinarian in a fantasy world, or a person who only has really good cooking skills, you get the point. I think that Kensei does this idea well, it takes a unique add on, and tries to make its own story revolving around the idea. And even though I have only read 5 chapters the story does seem to be a decent one. For its type of fantasy, it is in the higher range of 7. It knows it will not be a 10/10 because its not trying to be the next new big idea, its just trying o have a little fun with a new idea and see where it goes. Therefore if your the type of person who likes reading all those fantasy novles but... you will enjoy it. I cant stack it up against a show like Fullmetal alchimest sinc ethat is just on another level of creation and backing, but at the level Kensei is being published at, (a independent) its fun.