Her husband is also serious, and the stock investment that he started as a hobby is going well. Two thugs sneak up on Yumi's happy life. Yumi tied up and fucked. They were her husband's brothers. Oki, who happened to witness it, is obsessed with the charm of the rope that bites into Yumi's body. Using her secret as a shield, Oki binds Yumi. Yumi finds her pleasure in being tied up and fucked...
