Seven Amateur beauties in yukata found in a hot spring town challenge a 10-minute voice-holding game for a prize of 1 million yen! However, they all fail after making noise due to the relentless tickling and lewd prank of unbuttoning their yukata! Still, the Amateur girls who want the 1 million yen challenge themselves to voice-holding sex! They can't hold back their voices even when the penis is inserted! But it feels so good...!?