With a man I met in an open-air bath...

Kyoko and Yuko come to the hot springs alone because their husbands can't go. They immediately entered the open-air bath and were playing around, touching each other's huge breasts, when suddenly two men came into the open-air bath. She hurriedly hides her voluptuous body and tries to leave, but when men offer her bath sake, she is disgusted by her husband, so Kyoko and her friends accept the invitation. Then, the four men and women, who have become moderately intoxicated, generously make love to each other in the open-air bath where they just met.