Koyama Kimiko
- Dress Mania
- HIDPD-2006 : Dress Mania (Shiten'nou Udzuki) (Happy Lesson)
- Love Love Motion!
- HIDPD-2006 : Dress Mania (Shiten'nou Udzuki) (Happy Lesson)
- Love ran
- KSCA-29145 : Happy Lesson Hara Hara Music (Happy Lesson)
- Melody
- PSCR-6131 : Happy Lesson "Melody" (Happy Lesson)
- Pineapple Summer
- LKCR-10029 : Koikoi7 Song Collection, Paradise (Koikoi7)
- Place
- Super Love
- LKCR-10029 : Koikoi7 Song Collection, Paradise (Koikoi7)
- Vegetable Juice
- LKCR-10029 : Koikoi7 Song Collection, Paradise (Koikoi7)
- kirakira a la carte
- PSCR-6131 : Happy Lesson "Melody" (Happy Lesson)