Why Bother Playing Cards?

Why bother living what he thought was a normal life? One day, a fluffy tennis ball-like creature appeared in front of him. "Sign a contract with me, and I will take you to the top of your life." He Ku, who had long been tired of ordinary life, signed a contract with him with the mentality of giving it a try. As a result, he was transported by a rift in time and space to a magical world where cards were used to fight. With the help of local residents, He Ku is continuing to make an impact on the world.