Fair warning for those that do not like gay shit: this is not just Isekai, it's hybrid BL + Isekai, kind of like Hikaru is hybrid BL + Horror and Sasaki & Miyano is hybrid BL + Iyashikei.
However, a lot of the underlying themes are a "take that" at corporate life, so don't feel like it won't ever be relatable. The accountant character is a self-described corpodrone who has literally no life outside of work, and because he immediately starts rooting out suspicious entries in the books, he is "promoted" into an assistant manager position for laughs (he hates working management).