- hard to sayCrystal Kay/jU'''
- KissCrystal Kay/jU'''
- Kiss +3 男性キーCrystal Kay/jU'''
- think of uCrystal Kay/jU'''
- boyfriend partⅡCrystal Kay/jU'''
- Boyfriend partⅡ +6 男性キーCrystal Kay/jU'''
- Boyfriend partⅡ CメロCrystal Kay/jU'''
- 月のない夜 道のない場所Crystal Kay/jU'''
- 恋におちたら +5 男性キーCrystal Kay/jU'''
- 恋におちたら -1Crystal Kay/jU'''
- ONECrystal Kay/jU'''
- Boyfriend (What Makes Me Fall In Love)Crystal Kay/jU'''