The sequel to this doujin was uploade/d/ not too long ago. Tentacle fans, you wantee. So you'd better get over here and nail it before it's gone...http://www.animestars.net/AnimeStars is a HK site, BUT the guy puts up a main page with regular doujin updates for FREE.Right now, there's also "Souls" from Molotov Cocktail, a SoulCalibur doujinshi also full of tentacle fun, and a variety of other doujs.
Just to clarify: it's related to a HentaiKey site, but the main page doesn't require any membership at all.