
Quick answer — Aki Toyosaki worked on The World God Only Knows II (Theme Song Performance), Servant x Service (Theme Song Performance), D-Frag! (Theme Song Performance) and 5 more anime.
Aki Toyosaki worked on The World God Only Knows II (Theme Song Performance), Servant x Service (Theme Song Performance), D-Frag! (Theme Song Performance), Medaka Box (Theme Song Performance), Natsuiro Kiseki (Insert Song Performance), Kanamemo (Theme Song Performance), The Sacred Blacksmith (Theme Song Performance), Seikon no Qwaser: Jotei no Shouzou (Theme Song Performance).