Nagi Yanagi
The season use five pieces of theme music: one opening theme, three closing themes and one insert song. The opening theme is by Nagi Yanagi while the main ending theme is "Hello Alone" by Saori Hayami and Nao Tōyama. "Hello Alone -Yui Ballade-" by Nao Tōyama is used as the ending theme of the fifth episode. The ending theme of the Extra episode is "Hello Alone -Band Arrange-" by Saori Hayami and Nao Tōyama. "Bitter Bitter Sweet" performed by Yukino Yukinoshita (Saori Hayami) and Yui Yuigahama (Nao Tōyama) is used as the insert song of the twelfth episode.