Observer of Summer

1

Ostinato

2

libre (feat. IA)

3

Natsukaze Sanka (feat. KASANE TETO & IA)

4

Horizon (feat. HATSUNE MIKU)

5

I Can't Be Your Umbrella, But... (feat. KASANE TETO)

6

Kikyu Kansoku (feat. HATSUNE MIKU)

7

Utsusemi No Hikari (feat. IA)

8

Blue and the Early Summer Rain (feat. HATSUNE MIKU)

9

Longing for Summer (feat. IA)

10

Summer Memoir (feat. KASANE TETO)