"Free Boys Swimming Club Movie" tells the story of four members of the swimming club who won the championship in the conference before graduation in elementary school, leaving unforgettable memories and then parting ways. Times have changed, and the leisurely high school student Haruka Nanase suddenly meets his elementary school swimming club partner Rin Matsuoka one day. Rin challenged Haruka while reminiscing about the past, and Rin defeated Haruka overwhelmingly. Taking this as an opportunity, Haruka decided to regroup with Makoto Tachibana and Nagisa Hazuki, who were in the same high school, and established the swimming club of Iwatobi High School with new member Rei Ryugasaki and manager E Matsuoka. The dynamic high school boy unfolded this story about swimming, youth and bonds.