This is a Japanese-language magazine about games and/or gaming.
'In White' is one of those games whose goal is to 'get' one of many female characters into bed. This soft-cover mook is a nice collection of illustrations from the game, including several adult shots (naughty bits are blurred out), as well as character sketches and information. A bonus book cover and several bookmarks are also included. What text there is, is all in Japanese.