Asano Ruri
- Beautiful Day
- PSCR-6131 : Happy Lesson "Melody" (Happy Lesson)
- Follow Me!
- KSCA-29145 : Happy Lesson Hara Hara Music (Happy Lesson)
- Imitation
- SCDC-00174-2 : Min'na de Tsukuru Memo-Off CD! Disc.2 (Memories Off)
- Love Love Emotion!
- HIDPD-2003 : Soba ni Iruwa (Ichimonji Mutsuki) (Happy Lesson)
- Melody
- PSCR-6131 : Happy Lesson "Melody" (Happy Lesson)
- Memories I.N.G
- KDCA-0014 : Game Vocal Best Vol.3 (Misc-Compilation)
- Place
- Sumisora gakuen kouka seishou
- SCDC-00174-1 : Min'na de Tsukuru Memo-Off CD! Disc.1 (Memories Off)
- Thank You Boy ~natsu no yokogao
- SCDC-00159 : Memories Off First Concert Disc 1 (Memories Off)
- ame nochi omoide
- SCDC-00174-2 : Min'na de Tsukuru Memo-Off CD! Disc.2 (Memories Off)
- soba ni iruwa ~Standing by Your Side~
- HIDPD-2003 : Soba ni Iruwa (Ichimonji Mutsuki) (Happy Lesson)