"We'll have Haru Shibazaki challenge sneaking into a men-only sauna! If she isn't discovered, we'll give her a 100,000 yen travel voucher and vacation!" Swept up by the tempting offer and the momentum, she reluctantly dives in! Changing clothes live in the locker room! Washing her body next to customers, sauna experience! Although boyish, her body is too erotic and she's instantly exposed! Fucked in the bath, in the sauna, and in the locker room!