This is a dream project to trick the number one AV busty idol , Momoka Nishina, into playing a prank on her! Moka is at a signing session where many fans have gathered. However, it's not just a fan event. She is made to appear in a more sexy swimsuit than usual, and there is a big chance for all the fans to draw lots. The prize is the chance to touch Moka's breasts as much as you want! Of course, Moka hasn't heard about it. The venue is filled with an unusual heat. The fans are excited... Will Moka be able to get through this prank safely?