Kyon no Imouto / Imouto Wasurecha Oshioki Yo • Whose Song?

Kyon no Imouto / Imouto Wasurecha Oshioki Yo
is a song by
Kyon no Imouto (Aoki Sayaka)
it was released on
Suzumiya Haruhi no Yuutsu - Character Song Vol 06: Kyon's Sister