Simple little party and missing old friends under the moon. According to Cool Dog Music, "Hum a Song with Nothing" is a song composed by simple Xiao Fang and sung by simple Xiao Fang and an old friend under the moon. It was released on August 8, 2022 and included in the album Nothing to Hum a Song. Other representative works of Simple Square include Hillside Slope, Dream Lock the Piano Building, Humming with Nothing and so on. Other masterpieces of Thinking of an Old Friend under the Moon include Sleepless in Acacia, The Homeless, Nothing to Hum, etc.