Yo ch6 is available for free on their patreon (you're gonna have to use the filter to find it / the UI is a bit unfamiliar so it may be a bit hard to find) but the chapter is mainly there to set up for ch7 so it doesn't have much in the way of content
sure: https://www.patreon.com/posts/pale-carnations-140912018
but honestly its easy enough to find on your own just click the patreon link (thats already on this page) then keep scrolling down till you see it