TS Eiseihei-san no Senjou Nikki - Ch. 13

[Flaemes]

The thing is, the MG is such a massive plot point for the later volumes and by having it here this early just doesn't make sense, it such a massive divergence from the original web novel.

The manga is adapted from the light novel, not the web novel, like many other manga. And the author did say that the LN and the WN are parallel to each other.