OVA bundled with the 14th manga volume. Story about a joint practice session between Izuku's class and Isami High students at Yuuei Academy, takes place after the field training arc in the second season.

Hikaru Kusakabe is a normal, carefree boy in a rock band who is always focused on the present. During the summer, his entire class is forced to participate in an upcoming chorus festival. By coincidence, he discovers his classmate Rihito Sajou—known for being an honor student with excellent grades—practicing his singing alone. Sajou just cannot seem to get their class' song right, and Kusakabe, delighted at seeing a new side of his straight-laced classmate, offers to help him prepare for the event. Although their lives and personalities are total opposites, they begin to grow closer as time progresses. But with the pressure of an unknown future, what will become of them and their growing relationship? [Written by MAL Rewrite]

Rumor has it that Momo Kawashima, former student council member at Ooarai Girls Academy, is bound to repeat a year. Having failed her university entry exams, she is far from spending another year at Ooarai, but her plight is unenviable nevertheless. The only way for her to gain admission into a university is to be granted an athletic scholarship. With the Winter Continuous Track Cup rapidly approaching, Momo becomes the commander of Ooarai's tankery team, so as to demonstrate her sport skills and wipe away the stain on her honor. Their first opponent—French-themed BC Freedom High School—is split into two factions that are constantly at odds with each other. Despite this seemingly fortuitous match against a disorganized rival, Ooarai might soon find itself taking one step too far. [Written by MAL Rewrite]

The second film in the six-part Girls & Panzer: Saishuushou film series. Oorai team wins against the BC Academy team and moves onto the next round where they find themselves up against Chi-Ha Tan Academy. However, the Japanese-style school has changed up their strategy. How will Oorai react to this?