The second season of Boukyaku Battery returns to the comedy sports series adapted from Mikawa Eko's manga about school life and baseball. Previously, the iron-armed pitcher Haruka Kiyomine and the sharp catcher Kei Kaname, a feared middle-school battery courted by powerhouse programs, both unexpectedly enrolled at Tokyo Municipal Kotesashi High School, a school with no baseball reputation. There they crossed paths again with former rivals who had drifted away from the sport, and their high school baseball story began.