The funny combination "Fangzhong Swimmers", which has been making its debut for 12 years, has never been a big seller. Although the two partners, Yohei Tanaka (Junshi Ito) and Xiaozhi Kakamoto (Keisuke Komoto), are classmates and friends, they gradually become speechless in the face of embarrassment. The waves behind the Yangtze River push the waves ahead, and the pair are facing the fate of elimination. In order to change the current situation, A Ben came up with a good way to exchange thoughts and secrets that could not be told face to face by writing an exchange diary in Hotanaka. The introverted Tanaka was very resistant at first, but finally got used to revealing his heart to his partner and getting new creative inspiration from it. The annual "Funny Legion World number one Competition" is about to open, and the two people who do not dare to fail decide to attack their dreams again. In order to support their friends, lovers and peers, this pair of unfunny funny groups embark on the final journey. This film is based on Suzuki's novel "Yun people make friends with each other every day".