For the first season's episodes, the opening theme is  by Aya Hirano, and the ending theme is  by Haruhi Suzumiya (Hirano), Yuki Chihara (Minori Chihara), and Mikuru Ashahina (Yuko Goto). For the episode titled "The Adventures of Mikuru Asahina Episode 00", the opening theme is  by Asahina (Goto).
For the first season's episodes, the opening theme is performed by Aya Hirano, and the ending theme is sung by Haruhi Suzumiya (Hirano), Yuki Chihara (Minori Chihara), and Mikuru Ashahina (Yuko Goto). For the episode titled "The Adventures of Mikuru Asahina Episode 00", the opening theme is performed solely by Asahina (Goto).