Serie includes 90 albums .
Kaze o Hiitara o Shizuka ni
Kocchi no Ana de Shiyou?
Koi no Kakera
Koko de Hamete yo
Konami Kirie 17-sai.
Konami Kirie, 17-sai. Warui Ossan ni Okasareru!
Konna Demo Ii Desu ka?
Koori no Netsuryou
Kousoku SM
Lost and Found
Mayonaka no Gochisou
Milk ☆ Splash