My Hero Academia - U.A. Heroes Battle

U.A. Heroes Battle (雄英ヒーローズ・バトル) is the eighth OVA for the My Hero Academia series.

Premise
Winter vacation. Mirio Togata, a third year student, comes to see the Class 1-A students who are not allowed to go out of the dormitory and have a lot of time to spare. What he brought with him was the card game "Heroes Battle" created by the support department! The members of Class A begin playing right away, but this game, in which each hero uses their own cards, is not as easy as it seems, like a hero...! Who will be the winner of the card battle...!?

Trivia

 * This OVA takes places before the Second Hero Work-Studies.