Actually, it isn't all threesomes. It starts out with a traditional Japanese couples segment. By traditional we are talking about the familiar scenario wherein the girl is all smiles and eager and appears flattered at first by the attention and kissing and groping, then makes a complete change and frowns and closes her eyes once she is nude and lying there having sex.

When the little gal (fully dressed) finds herself with two guys, she happily smiles while chowing down on their dicks, separately and together, until (you guessed it) her clothes come off - at which point the eyes very tightly close, and she looks away and frowns for the duration.