Does this not count as an isekai?
Also, I usually praise this kind of diamond-in-the-rough art-style, but this one feels just a smidge lazy. Mostly its shading where it just uses a fill tool with various patterns. It works fine for cases like the first page because most of the spread is filled with closed shapes. But then look at page 6, and I can't tell for the life of me what is supposed to be depicted on the left of the page. I appreciate the scarce use of color though.
It's not perfect, but I'm a fan of these low-scale projects with some heart to them. Keep up the good translation work.