Basically you should watch this OVA after seeing episode 4 in season 2. This was a fun little time with Hinata and Kageyama trying to get a good grades on their tests while Ryu wants to convince his sister to drive them. It expands on the beginning of one of the episodes in season 2, and earns it with the wig sequel with the principal and Tsukishima's backhanded motivation that works the best when it comes to results. It doesn't hit as well as the slapstick comedy when they learned they had to get good grades, but more time with Saeko is good to me.Also putting Yamaguchi and Yachi together as teachers and graders to the dynamic duo was a subtly good addition given that Yamaguchi likes her.