You know you're into a show when you enjoy it when it covers up topics that have nothing to do with the main premise.
This is a self-centered OVA that follows the Seirin gang stressing over helping Kagami do better in his midterms because participating in an upcoming game requires not failing your subjects. Ît just had to relate to Basketball at the end of the day. Very comedy focused episode, a lot of gags and funny character interactions too.
I mean I agree that a two-days cramming session wouldn't make much of a difference but man did I not buy the Midorima charm deus ex-machina jolt down at the end.