Two wives who leave their husbands behind and go on a hot spring trip, and two husbands who play homosexual games because it's not fair for them to be the only ones enjoying it. In contrast to the wives, who warm each other's bodies with hot water and lesbian play, the husbands cool each other's bodies by facing each other naked on a dark table with a bottle of sugar. There is another couple in danger of getting married because their parents disapprove of their relationship, but these two also c...