My Hero Academia Volume 12 by Kohei Horikoshi
The students work on signature moves and upgrading their costumes as a prelude to their next test--the Provisional Licensing Exam. It's another all-out battle between the students of several schools, with the top one hundred qualifiers moving on to the next round which will happen in the next volume.
The book has a lot of action but little else going on story-wise. I'm not sure there's any reason a reader couldn't just skip this volume. Only one new character is introduced and most everyone we care about makes it through the exam. It reads like one of those filler episodes on TV shows.