Kitto Wasurenai

Kitto Wasurenai (きっと忘れない lit. I'll Never Forget) is the second track of Vol.4 Haruka Nanase & Rin Matsuoka character song duet CD of the Free! anime. It is performed by Haruka Nanase and Rin Matsuoka's  seiyūs, Nobunaga Shimazaki  and Mamoru Miyano. The song was released on March 19, 2014.