Goto Yuko (後藤邑子)
Release date: September 24, 2008
02 Chloe- I -Senior-
03 Chloe- I -Senior- (Music box Ver.)
04 Blue Moon (off vocal)
Release date: September 10, 2008
03 Shalalala Dolce (off vocal)
04 Chiisana Ochakai (off vocal)

? de wasshoi
"Hidamari Sketch x 365" OP
Release date: July 23, 2008
01 ? de wasshoi with Asumi Kana, Mizuhashi Kaori & Shintani Ryoko
02 Sutakora dream with Asumi Kana, Mizuhashi Kaori & Shintani Ryoko
03 ? de wasshoi (instrumental)
04 Sutakora dream (instrumental)

Special☆Gyutto Good Luck!
Anime "S A (Special A)" ED2
Release date: July 16, 2008
01 Special☆Gyutto Good Luck! with
Nabatame Hitomi &
Takagaki Ayahi
02 Nonstop. High tension!
03 Special☆Gyutto Good Luck! (instrumental)
04 Nonstop. High tension! (instrumental)

Sketch switch
"Hidamari Sketch" / "Hidamari Radio"
Release date: January 24, 2007
01 Sketch switch with Asumi
Kana, Mizuhashi
Kaori & Shintani
Ryoko
02 Onnanoko puzzle by Asumi
Kana
03 Sketch switch (instrumental)
04 Onnanoko puzzle (instrumental)

Saikyou pareparade
"Suzumiya Haruhi no Yuuutsu SOS-dan
Radio Shibu" OP2/ED2
Release date: November 22, 2006
01 Saikyou pareparade with Hirano
Aya &
Chihara
Minori
02 Unmeiteki jiken no koufuku with Hirano
Aya &
Chihara
Minori
03 Saikyou pareparade (off vocal)
04 Unmeiteki jiken no koufuku (off vocal)
Character Song Vol.3 - Mikuru Asahina
Release
date: July 05, 2006
03 Harehare yukai (Mikuru solo)
04 Mitsukete happy life (off vocal)
05 Toki no puzzle (off vocal)
06 Harehare yukai (off vocal)
The Melancholy of Suzumiya Haruhi ED
Release date: May 10, 2006
01 Harehare yukai with Hirano
Aya &
Chihara
Minori
02 Welcome unknown
with
Hirano
Aya &
Chihara
Minori
03 Harehare yukai (instrumental)
04 Welcome unknown (instrumental)