- Camping Trip
- Castle
- Century Dive
- Changing Seasons
- Changing Seasons –Reload– by Atsushi Kitajoh (Ft. 高橋あず美 (Azumi Takahashi)) prod. by Atsushi Kitajoh
- Chiaki
- Climb the Stage Together!
- Club Velvet
- Colorful Lights
- Colors Flying High by Lollia (Ft. Sapphire) prod. by Sleeping Forest
- Colors Flying High by Lyn Inaizumi
- Colors Flying High (Opening Version) by Lyn Inaizumi
- Confession/Secret
- Confession/Secret (Piano Version)
- Confrontation
- Corridor
- Counterfeit Phantom
- Crane Game
- Crisis
- Crossover