A swimsuit-clad stunner encountered on a Shonan beach challenges a virgin with a huge penis to a "bare buttock oil massage"! SKMJ-198

Summer 2021... a shorter summer than usual, a project takes place on the Shonan coast! Under the guise of a dating experiment game, strangers are approached and offered prizes for taking on a buttock massage challenge! But in the end, they can't resist their sexual desires and end up penetrating! The sexual desires of young men and women can't be contained by a thin membrane!