A girl who is new to Pilates, thinking that personal training and large gyms are too difficult from the start, asks her male friend, a Pilates instructor, to hold a 4-on-4 beginners' class. Since they are friends, they proceed with flexibility and posture maintenance in a gentle manner and get to know each other. After the first half of the class, they take a shower and take a short break and have a snack before the second half of the class... However, there is a little alcohol on the spot, and the four of them are in a good mood and open both their minds and bodies... After that, they split into 2 and resume the class, but the men and women who have turned on their erotic switches do whatever they want in their Pilates costumes! They have a big orgy with sex, switching girls in the middle! [Kira Kira Days Maina/B:90 W:61 H:96 Mizuki/B:85 W:54 H:88 Hono/B:94 W:60 H:94 Emi/B:88 W:57 H:90] *This work features adults cosplaying. *All performers in this work are adults over 19 years of age. (All performers in this work are adults over the age of 19.)