HIGH SPEED! -FREE! STARTING DAYS-

An anime adaption of the light novel High☆Speed! Before they were making waves in high school, Haru and Makoto took their marks in junior high! Take a dive into the past with your favorite swimming boys and new faces as they learn what it means to work together and make new friends. (Source: Funimation) — Description from AniList community (anilist.co).