"Silly-Go-Round" is the fifth single of J-pop duo FictionJunction Yuuka.

This single includes the opening theme song for the anime series .hack//Roots, as well as "angel gate", a song from the musical Angel Gate: Haru no Yokan (Angel Gate: 春の予感) in which Yuuka Nanri, the vocalist of FictionJunction Yuuka, stars.

Both songs were composed by Yuki Kajiura.

Its catalog number is VICL-35889.

[1] Oricon Sales Chart (Japan) * Sales after 3 weeks