here is my save. after you get 2 endings or i think 3, you get omake on main screen to get rest of the cg. view them from scene since for what ever reason gallery dont show all the cg even when unlocked.
beside the gallery being bugged, i think the game itself is bugged on getting endings. i choose the choices to get a ending than i started from new game and choose the exact same choices which end up giving me another ending. so to get all the ending after getting the 2 ending by using save points, i started new games instead from save points. went through the choices again to get the endings which end up unlocking the omake on main screen. to me it seems like some sort of bug.
even with CG, it seems like i can't view all the cg that i viewed from playing the game. not sure if im allowed to post links here or not but if you want to see the CG that you can't view from the gallery or scene section ( i think scene section covers it all but i could be wrong since i didn't check all the scenes), you can check the missing CG here http://dlbooks.to/detail/LV9BB1wNE9 or http://dlbooks.to/detail/download_zip/LV9BB1wNE9