麻枝准
"Heartily Song" is a single released on April 1, 2015 in Japan by Key Sounds Label bearing the catalog number "KSLM-0099". The single contains the opening and ending theme songs to "Angel Beats! -1st beat-" sung by Lia and Suzuyu, respectively. Each song is presented in full length, game size, and instrumental versions. The single is composed by Jun Maeda and Tomohiro Takeshita, and arranged by the group Anant-Garde Eyes.