It was released by Warner Music Japan on June 29, 2021, as a digital single from their third Japanese studio album of the same name (2021).
[3] "Perfect World" was composed by Woo Min Lee "collapsedone", Justin Reinstein, JJean and LACND, with lyrics written by Risa Horie.
[5] "Perfect World" was described as a fast-paced song that depicts a "strong woman" who is unfazed by any situation.
[6] The song's music video, directed by Yoojeong Ko, was released on YouTube on June 29, 2021.
[11] The week of July 7, 2021, "Perfect World" debuted and peaked at number twenty-four on the Billboard Japan Hot 100.