Comparing to the WN, this manga chapter covers WN chapters 46-54.
One major difference in the WN is that it was Luck and Celiss who intervened to save Milka from the thugs; not the sibling adventurers.
@ericbj Its because of the online subscription system for manga. Nowadays, many manga publishers release monthly chapters online in parts (So instead of a 40-50 page monthly chapter, they'd release them in 2-5 parts, in this case, 10 pages per week in 5 parts), then release the whole chapter in their usual paperback monthly anthology books. I think its because of the scanlators wanting us not to be left hanging after each part, thus let the whole chapter pile up before releasing it at once.
@Twi@Huapollon To be fair, keeping them as individual parts is kind of pointless if you're just going to release them in bulk like this as a full chapter. Other than maybe uploading a "complete" chapter without realising that the last part hasn't actually come out yet. But then you could just release that missing part as a .1 or whatever, and then add a note at the start if you really need to.