In an upscale apartment in Rachigi in Tokyo, there is a little-known bizarre custom shop open from 0: 00 a.m. to 5: 00 a.m., for men and women who want to have sex. The guests on this day are four men and four women, as well as a couple who joined halfway. These people with very different identities and personalities will take off their camouflage and invite each other to have a "loveless sexual experience" within five hours, and the whirlpool of love will involve them all.