The "XLied" (Duet) series has evolved beyond a unit. Vol. 4 features Ren Munakata (Taishi Murata), Nozomu Nanase (Chiharu Sawashiro), Mamoru Fujimura (Junta Terashima). Composed by Mamoru Fujimura. Contains 1 duet, 1 instrumental and a drama part (approx. 15 minutes).