It's the last day of the Inter-High, and the lead riders are 4.5 kilometers away from the finish line. In order to defend their lead position won by Naruko's desperate resolve, Imaizumi challenges Midousuji. Despite being mentally broken by Midousuji numerous times, Imaizumi grew with his team's support, and he doesn't flinch from Midousuji's risky tactics as he rides like an ace! However, it suddenly begins raining on the last downhill before the finish line! The risky battle between Imaizumi and Midousuji in the rain begins!