nao, a new bride, is pressured by her mother-in-law to have a grandchild soon. one day, the family decides to go on a hot spring trip. however, nao is ordered to abstain from sex for a month leading up to the trip. on the day of the trip, nao is surprisingly rejected by her husband. meanwhile, her father-in-law is also rejected by his wife. the two, overwhelmed with sexual desire, head to the hot spring to calm their bodies. then, nao's father-in-law accidentally sees nao bathing...
