In a high-end apartment in Roppongi, Tokyo, there is a little-known peculiar custom shop, which is open from midnight to five in the morning and is open to men and women who want to have sex. The guests on this day are four men and four women, and a couple who join in halfway. These people with different identities and personalities will take off their disguises in these five hours and invite each other to have a "loveless sex experience", and the whirlpool of love will also draw them all in...