Vol.4 Haruka Nanase & Rin Matsuoka

Vol.4 Haruka Nanase & Rin Matsuoka (Vol.4 七瀬 遙 & 松岡 凛) is the fourth character song duet series CD of the Free! anime. It is performed by Haruka Nanase and Rin Matsuoka's  seiyūs, Nobunaga Shimazaki  and Mamoru Miyano. The CD will be released on March 19, 2014.