Amateur girls take on the challenge of quickly changing into super-tight, tiny school swimsuits! The maximum prize of 100,000 yen is reduced by 1,000 yen for every second that passes! If they can quickly change into the tiny school swimsuit within the time limit, they get the prize for the remaining time! However, these Amateur girls fail over and over! Of course, they are forced to take off their clothes and take on the challenge in one tearful attempt! They quickly change into their clothes while hiding their bare skin, but in the end they fail the challenge and are punished by fucking in their school swimsuits!