第4話: コグマが子熊と共に夏休みの学校書類配達アルバイトに挑戦
2021年4月28日 放送
This is the first summer since Koguma started riding the Cub. Reiko said that she wanted to do something huge for summer. Meanwhile, Koguma decided to work as a transport for school documents. She's transporting important files between schools with the Supercub. Before she starts her transport duty, Koguma went to Shino's shop again to change her oil.