One day, two men suddenly visit Daisuke's house. One is an old man in swallowtail, and the other is a muscular man in black suit. The old man gives him a business card. "Shinomiya zaibatsu...?" According to him, Daisuke is a grandson of the president and he is qualified to take part in a race for the next president. "Me? How come? I've never heard about my grandfather." He is surprised to hear that, but he thinks, "Wait. Calm down. It can't be true." The old man says, "We don't have enough time, so please get into our car." Like this, he arrives at a big house. "Well, what will be, will be. Must be fun! If it's too much for me, I'll refuse it." But it's not that easy to refuse....