Once again, a special one-way mirror studio has been set up at the super cheap izakaya "Furu-chan". But this time, it's a new project that also doubles as a survey of couples' attitudes towards cheating! A sexy slut is persuaded to give a blowjob to her boyfriend who is in the bathroom! What will be her reaction when she is shown the whole thing on the monitor? When her boyfriend returns, she slaps him ferociously, and from a hesitant blowjob to a girl who even allows him to penetrate her under the influence of alcohol...