S3OVA1 Buildup of Early Spring!

Buildup of Early Spring！ (早春のビルドアップ！ Sōshun no Birudoappu！) is an OVA released before the third season of the Free! anime was aired and is considered to be episode 0 of Free!-Dive to the Future-. It premiered in Japanese theatres on June 23, 2018, and was bundled with the DVD and Blu-ray releases of Free!-Dive to the Future- which were released on September 26, 2018.

Characters
List of characters in order of appearance: