This is a very popular series that observes and thoroughly examines amateur men and women! This time, we asked them to play a game with a prize! The brother and sister change into swimsuits and take a mixed bath in a special bath! They wash each other's body and get naked! Each time they complete various missions, they get prize money! But the missions become more and more extreme! The missions gradually escalate, and the brother and sister get excited! But in the end, do they cross a line they shouldn't?