God knows...

 is a song covered by Poppin'Party.

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 The Melancholy of Haruhi Suzumiya.

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

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 version of the game.
 * In other versions, the first song to do so was Determination Symphony.