Kuromi wants to show off her new 40" polka dot beach ball. She goes back and forth with grinding and roughly bouncing on the beach ball. She wants to see just how much her beach ball can take so she continues to roughly bounce on the beach ball, lifting herself and pushing all her weight down as she bounces. In between the bounces you can sometimes see flashes of Kuromi's pussy as she's not wearing any panties. The whole video Kuromi is so determined to pop her beach ball. Eventually she causes a leak from her vigorous bouncing. You might notice Kuromi getting out of breath from all her bouncing ( the video was originally about 30 minutes long, but it was shortened since it might be boring watching me bounce for 30 minute straight.) After Kuromi discovers the leak in the beach ball she keeps bouncing until the beach ball goes down.