Just a heads up: this is the Web Novel version of Kumo Desu. It is currently on hiatus while Okina Baba works on the anime and light novel, and is not complete (it is fully translated, though). Chapter S35 - Two Options (Ch. 557) is the latest chapter.
There are major differences and a massive amount of additional content in the LN from Volume 4 onward, which is about Chapter 145-150 of the Web Novel and where the Manga has just gotten to after 3.5 years.
For example: Volume 4 is about 90% new content, Volume 5 is 60%, Volume 6 is 85%, Volume 7 is 99%, and Volume 8 is 90% with major revisions.