Boku no Hero Academia: Sukue! Kyuujo Kunren!
English name: My Hero Academia: Rescue! Rescue Training
Genres: Action
Type: OVA, Episodes: 1
Aired: Apr 4, 2017
Studio: Bones
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
UA High School must regain the public's confidence after the surprise villain attack during class 1-A's training session. Although some of the teachers were gravely injured in the attack, Izuku "Deku" Midoriya and his classmates must continue to learn and train, and utilize their quirks in varying environments and circumstances. 

Boku no Hero Academia: Sukue! Kyuujo Kunren! follows class 1-A as they attempt to finally complete their training. However, there's a masked figure roaming around the training center. Have the villains responsible for the previous incident returned to finish the job? If so, are the students ready to fight back?