Having received an invitation from Shiroyasha, Izayoi and the others participate in a game hosted by the community "Sukunabikona." Upon arriving at the hot spring town, they find a game being held to revive the depleted water source. Eager to clear it and enjoy the hot springs, they are met with bizarre and challenging problems that confront Asuka! Yō! And even force Kuro Usagi to stand before them... naked!?