Okay, can anyone explain me what's with that chapters? Ch. 3 is 0.24, while ch. 2 is 0.22, so if you think about it, ch. 3 should have the content from ch 2. but I'm not really sure. I don't know if I need to download only ch. 3 or rather every each of them.
Narratively, they are all related, but can all be played independently with little to no issue.
Having all of them will give you a greater sense perspective and continuity (and stuff to play with) but is not essential.
Chapter 2 is hands down the one with most content to play with, by far.
Chapter 3 is about 2-3 months old and kind of got people here in the thread by surprise, as many still feel it did a sudden plot turn with the new relatives living with the MC in his new villa, while leaving a number of previous storylines hanging, though last version started dealing with that.
Personally i suggest you play either or both of the previous chapters, both to get more out of the whole and because chapter 3 might get an update or two before you are even close to finishing the previous two.