Erii appears (sings/talks) in the following CD singles.

2015 05.13	Colorful Story [Every-ing] (NMAX-1187)	Song
2016 02.10	Shining Sky (KICM-1653)	Song
2017 04.19	Juudai Koukyoukyoku (COZC-1310)	Song
2017 08.02	Jounetsu Fruits (COZC-1361)	Song
2018 08.22	Starlight (COCC-17487)	Song
2019 02.27	Last Promise (COCC-17565)	Song
2019 03.20	Trick (VICL-37470)	Song