Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e

There was a sport festival that awaited for D-Class at the end of a long summer vacation. However, there's no way the event of Advanced Nurturing High School is something that superficial. In the sport festival where all grades are divided into two teams, Red and White, competing for victory, D-Class united with A-Class to engage B-Class & C-Class alliance. Furthermore, ranking is given to all competitions, and points can be obtained by rank.

Sudō, who causes troubles to others up until now, has become D-Class' trump card and people confident in their athletic abilities are filled with anticipation. Meanwhile, Horikita, without changing their own way, gives birth conflicts around her. That opportunity can not be overlooked by Ryūen, the leader of C-Class and a traitor who hides in the shadow ――?!

Source: You-zitsu.wikia