God knows...

 is a song covered by Poppin'Party.

It was one of the challenge songs for the Japanese server's run of the event Days of Toppings and Fun☆.

It was originally sung Hirano Aya (as the character Suzumiya Haruhi) and used as an insert song for the 12th episode of the first season of.

Videos
Expert Preview =

Live Performances

 * April 18, 2015: BanG_Dream! 1st Live: I started a band in spring!
 * June 14, 2015: BanG_Dream! 2nd Live: Instruments × Girls = Justice!
 * September 26, 2015: BanG_Dream! Kansai Live: BanG_Dream! Won't you come to Kobe?
 * October 11, 2015: BanG_Dream! 4th Live: Welcome! Poppin☆PARTY!!!!!
 * April 24, 2016: BanG Dream! First☆LIVE Sprin’PARTY 2016! (Nishimoto Rimi Solo)
 * August 24, 2018: Animelo Summer Live 2018 ~OK!~ (Day 1)

Trivia

 * This song's Expert difficulty was the first song to have more than 1000 notes in the Japanese server of the game.
 * In other servers, the first song to do so was Determination Symphony.