Sora wo Hau

A young couple is having a casual conversation at a fast food restaurant. Fumi says she prefers to dress this way, even though the man urges her to be less exposed, because she is about to be tied up and will have marks from the rope. The two arrive at a happening bar where several couples are engaged in perverted play. They do not join in the circle, however, and begin to have bondage sex in a space separated by a curtain.

(Source: DMM)