[3] In March 2018, the group released the first installments in the series, Yellow Flower and the single "Starry Night".
[4][5][6] On July 16, 2018, Red Moon was released as the second installment of the series, with "Egotistic" serving as the main single for the era.
[7] On August 7, 2019, the re-recorded Japanese-language version of the song was released as part of the group's debut Japanese album, 4colors, by JVCKenwood Victor Entertainment.
[8] On September 15, 2021, a remix of the song subtitled the "Blistering Sun Version" was released as part of their debut compilation album I Say Mamamoo: The Best.
[21] As of August 2023, "Egotistic" is the group's second most-streamed song on Spotify, with 122.3 million streams to date.