* "Futatsu no Kodou to Akai Tsumi" by ON/OFF (season 1)
* "Rondo Rondo Rondo" by Yuya Matsushita (season 2)
* Ending themes:
* "Still Doll" by Kanon Wakeshima (season 1)
* "Maria" by ON/OFF (season 2)
* "Last Game" by An Cafe (OVA)