The video quality on Vol. 15 looks like a tenth generation dub, practically negating any erotic content.  The opening scene with a woman being teased and fingered by a couple through the stocking holes of a fishnet is barely acceptable, but far better than the remaining segments.

Vol. 16 fares much better, with a number of pretty girls and more explicit action than you'd expect from the usually reserved Japanese.  Here, the babes masturbate, suck dick and take the sushi salami in every conceivable position, including a standing fuck in the shower.  The angles aren't particularly arousing but the sound of females climaxing is frequent and authentic.  Better yet, the girls eat hot dollops of cum, which is pretty rare for these kind of import vids.