[1][2] Prior to debuting, Kazuma Mitchell was an exclusive model for Men's Non-no and a student at Harvard University, while William Aoyama was a Junior Olympic swimmer.
[1] In October 2018, they released their digital debut single, "Heart of Gold", followed by "Falling" in November 2018, "Body Language" in December 2018, and "You're the Reason" in July 2019.
"[4] Later, on August 21, 2019, they released their first album, Intersection, digitally, with the song "You're the Reason" as the promotional track.
"[3] In 2021, Kazuma, Caelan, and Mika participated in the Chinese reality survival program Produce Camp 2021.
While Kazuma left the show and Caelan was eliminated in the final episode, Mika placed 4th in the competition; he subsequently debuted in the Chinese boy band Into1.