silkscale

I bought the Sekai Humble Bundle, and I got Saku Saku in it. I prefer games that are patched, but Saku Saku doesn't have any for the Steam version. I've read sometime ago where you can literally move an R18 version of a visual novel to the Steam Folder of the game, and you can play the game with Steam, albeit it may disable achievements and the chance to get Steam trading cards. Can anybody link me a guide or tell me how?