Quick answer — Shikao Suga worked on Honey and Clover II (Insert Song Performance), xxxHOLiC Rou (Theme Song Performance), xxxHOLiC Shunmuki (Theme Song Performance) and 2 more anime.
Shikao Suga worked on Honey and Clover II (Insert Song Performance), xxxHOLiC Rou (Theme Song Performance), xxxHOLiC Shunmuki (Theme Song Performance), Honey and Clover (Insert Song Performance), Letter Bee Reverse (Theme Song Performance).
