HAPPY★LESSON SOUNDTRACK CDHAPPY★LESSON SOUNDTRACK CDHAPPY★LESSON SOUNDTRACK CD

Disc 1

1. 1 - SO HAPPY!SO HAPPY! (2:16)
2. 2 - HAPPY SMILEHAPPY SMILE (2:26)
3. 3 - Time of Peaceful Colourやすらぎ色の時間 (2:11)
4. 4 - Mad Scientist?まっどさいてんてぃすと? (2:01)
5. 5 - Sword and Exorcisation and Medical Room!?剣と除令と保健室!? (1:44)
6. 6 - Great March of a Cosplay Angelコスプレ天使の大行進 (2:00)
7. 7 - Run! Fight! Break Through It!走れ! 戦え! 突き抜けろ! (2:08)
8. 8 - The Great Detective Goes Through the Night名探偵、夜をゆく (1:48)
9. 9 - What You Used to Be, What I am Nowあのころの君、いまの私 (1:50)
10. 10 - Happy Member, Gather Here!ハッピーメンバー全員集合! (1:57)
11. 11 - Leave It to Me, Darlin!まかせてダーリン! (1:48)
12. 12 - Damn, I Did It...あ～あ、やっちゃった.. (1:41)
13. 13 - That Might Be a Good Ideaそれってありかもね (2:06)
14. 14 - Our Hesitationぼくたちのとまどい (2:06)
15. 15 - And the Mystery Deepens Againそしてまた謎を呼ぶ (1:46)
16. 16 - You Stand Still in My Memory記憶の中にあなたは佇む (1:20)
17. 17 - HAPPY TOGETHERHAPPY TOGETHER (2:32)
18. 18 - HAPPY LESSON in Great Yedo大江戸HAPPY LESSON (8:14)