Seiryu Elementary School is famous for sports, and one day, a new transfer student in a mawashi-style uniform arrives!! He is a sportsman who has both extraordinary athleticism and a gentle personality. However, the incident happened on the first day of the transfer. Kurotetsu from Shioryu Elementary School has come to challenge Kongo to a match after finding out where Kongo is transferring to. The event is tug of war. However, it is said that the loser is in danger of losing his life because it is performed on a very high footing. Kongo is puzzled by the match involving his friends, but Kongo's classmate Shido declares that he will accept the match. However, in front of his opponent's sneaky tricks, Kongo's friends drop out one after another, and in the end, Kongo has to fight alone...!!