With the island test over, Ayanokoji Kiyotaka and the others are enjoying their summer vacation on a luxury liner. Suddenly, they're interrupted by a new special test. Ayanokoji is called into the same room as Karuizawa Kei and others, where they learn that this test isn't strictly along class lines...

As the sports festival comes down to the wire, Horikita must deal with Sudo, as well as Ryuen's threat.

Horikita decides to use Paper Shuffle to settle matters with Kushida, and Ayanokoji finds himself caught in the middle.

As the day of the Paper Shuffle draws near, the plans of the various forces in play collide.

Karuizawa, whose cooperative relationship with Ayakoji has ended abruptly, cannot hide her embarrassment at the complete loss of contact with him. As Class D discusses their plans for the future, Ryuen and the other members of Class C appear overbearing.

The aftermath of the gymnasium incident plays out as Christmas brings romance to the school.