[A real perverted M-girl who gets ecstatic from being slapped and whipped so hard!] M-girl Yu Yi Swallow x Sadist Switch Fully Open Rui Otozumi. The ultimate lesbian master-slave relationship is complete! Tsubame, who begs Rui to train her in private, willingly falls into the role of lesbian slave... Bondage, slapping, spanking, whipping, pet training, strap-on fuck... Rui is also pleased by the reaction of Tsubame, a true masochist who enjoys herself with her ass red and swollen. Both are excited by this hardcore S×M lesbian relationship!