Futaro is hospitalized for a while after falling sick at camp school. He returns to work tutoring the quintuplets, only to realize someone has fallen way behind.

There’s one week left to the term final. Futaro and the sisters are set on passing this time, but Nino and Miku can’t seem to get along.

After discovering Yotsuba wants to quit the Track team but can't tell her teammates, Uesugi disguises Itsuki to resign for her.

Uesugi runs into the Quintuplets while out shopping. They invite him to visit their new home with an ulterior motive.

The quintuplets’ father tries to get Futaro’s classmate, Takeda, to take over as their tutor. They make a bet.