What?! I didn't hear about this!!! Girls take on a mysterious project in hopes of winning a prize! It's called the swimsuit intercrural sex challenge! They struggle with the unfamiliar intercrural sex, but when they start to feel good, it's time for a slippery insertion! Can these 10 girls, who can't resist the pleasure and shake their hips with all their might, actually get the luxurious prize (creampie) ?! [Streaming only Vol.01]