OMG! There's a title from major JAV studio S1 from several years ago, SSNI-378, where seven of their biggest name stars take some bus to a resort, where a dozen or so of their biggest 'fans' await. In the final orgy, there is a point where the seven of them are lined up in a row, all simultaneously getting fucked from behind. One of them, Yua Mikami, looks from side to side and sees the other ladies all getting cock while she is getting one too and she has the most adorable look of 'what the hell am I doing?' No way that could have been planned by some 'director', that was totally in the moment. If you're not expecting something that real, it's an instant load-blower!

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