Free! Dive to the Future: Soushun no Build-up!

Haruka Nanase and Makoto Tachibana are adjusting to their new lives in Tokyo as they prepare for university. A simple errand unexpectedly lands them in a regional mascot wrestling competition, where they end up representing Iwatobi while their old friends watch the spectacle from afar.

Elsewhere, Ikuya Kirishima and Hiyori Toono reflect on the difference between rural life and the city. Chance encounters across Tokyo quietly reconnect old friendships and signal that a new stage is beginning for swimmers whose paths are about to cross again.