i thought that was a filler chapter but i guess theres something going on at the end, ima just guess and say that this has parallel people as in kinda like dopplegangers in a sense but iskeai version
if this were more like monster girls manga or nekopara, that would be better
this manga mystery and stuff isnt really that great, whole those 2 above doesnt need much "plot" in the first place
just OPPAI and ECCHI is the plot