This site is misleading its customers into believing their content isn't censored, and they've gone to great lengths to make sure that narrative is established. Do not let them get away with their lies!
http://sanahtlig.blogspot.com/2016/08/nutaku-caught-censoring-evidence-of-censorship.html
Many hentai/porn games virtually free to play but made to bait the player to pay money for items that allow to play more and store more game items. It can be really frustrating if not impossible to continue play some of those games without buying something.