I only know where to find the first 2 volumes full. I can't find a spot that has all of 3 and all of 4 online, unfortunately. Since it has an official translation though, you could buy it online and then read it, haha.
I...don't know what that is. Sorry, I don't trust downloading random files from people I don't know because it might be a virus or something like that. Besides, if it's manga I don't speak japanese so I can't translate it.
If you tell me what it is though I might be able to find a translated version of it online.