Boku no Hero Academia: Training of the Dead
The story takes place after the field training arc in the second season, and revolves around a practice session between Izuku's class and Isami High students at Yuuei Academy. Note: This OVA was bundled with the 14th volume of the manga
Aired 02/06/2017EP 1 - Boku no Hero Academia: Training of the Dead

2017
Boku no Hero Academia: Training of the Dead
The story takes place after the field training arc in the second season, and revolves around a practice session between Izuku's class and Isami High students at Yuuei Academy.
Note: This OVA was bundled with the 14th volume of the manga