宮野真守
Four duet character song singles were released sung by the voice actors of the main characters. The single with Haruka (sung by Shimazaki) and Makoto (sung by Suzuki) was released on December 18, 2013, and sold over 16,361 album copies. The single with Nagisa (sung by Tsubasa Yonaga) and Rei (sung by Daisuke Hirakawa) was released on January 15, 2014, and sold over 11,980 copies. The single with Rei (sung by Daisuke Hirakawa) and Rin (sung by Mamoru Miyano) was released on February 12, 2014, and sold over 13,389 copies. The last single with Haruka (sung by Shimazaki) and Rin (sung by Mamoru Miyano) was released on March 19, 2014, and sold over 15,866 album copies.