Kitare! Iwatobi Koukou Suiei-bu! Relay de Hagukumu、 Seishun no Kizuna

'''Kitare! Iwatobi Kōkō Suiei-bu! Relay de Hagukumu、 Seishun no Kizuna' (きたれ!岩鳶高校水泳部! リレーで育む、青春の絆 lit. Come! Iwatobi High School Swim Club! Nurturing Relay、 Bonds of Youth) is a bonus booklet of the Free!-Eternal Summer-'' anime.

Summary
The booklet is a tokuten (特典 lit. purchase benefit) that came packaged with the DVD and Blu-ray releases of the first volume of Free!-Eternal Summer-. The booklet was received as a benefit if the volume was purchased through the KyoAni Shop along with the all other volumes in the season.

The booklet contains character introductions for all the members of the Iwatobi High School Swim Club including the manager, Gou Matsuoka, & club advisor, Miho Amakata. The booklet & profiles are written in the style of introductions to a new member joining the club. It is paralleled by the SAMEZUKA SWIMMING CLUB booklet that was released with volume 2.