This is a Japanese-language book or magazine about figures and/or figure modeling.
Not sure why they need cleavage to advertise candy toys, but there you go, and there's a cute girl on the cover and a few on the inside. Inside as well is a fantastic selection of candy toys from a bazillion series and various manufacturers; and Max Watanabe shows one of the girls how to modify a figure to suit her own taste. A shop list is included in the back. 162 pages, soft cover.