Responses
Yeah, it has it's own "chapters" but it's really just the 4th volume split up into 3 pieces. In the postscript of the 4th volume, the author mentions about wanting to make a 5th volume cause they kept straying from what they originally wanted to make. So.. there's not really an end yet.
As mentioned previously there isn't a 5th chapter. BUT. At myreadingmanga.info chapter 4 got 3 own "chapters" which includes the end :3