Quick answer — Sphere worked on Bakuman. 3 (Theme Song Performance), Hanasaku Iroha ~Blossoms for Tomorrow~ (Theme Song Performance), Squid Girl 2 (Theme Song Performance) and 13 more anime.
Sphere worked on Bakuman. 3 (Theme Song Performance), Hanasaku Iroha ~Blossoms for Tomorrow~ (Theme Song Performance), Squid Girl 2 (Theme Song Performance), Zakuro (Theme Song Performance), Hatsukoi Limited (Theme Song Performance), At The Mercy of The Sky (Theme Song Performance), Nanana's Buried Treasure (Theme Song Performance), Natsuiro Kiseki (Theme Song Performance) and 8 more.