The group consisted of eight members: Suyeon, Elly, Yoojung, Doyeon, Sei, Lua, Rina, and Lucy.

In 2015, i-Teen Girls members Kim Do-yeon, Choi Yoo-jung, Lua, Lucy and Elly (as well as former trainees Chu Ye-jin and Lee Soo-min) had numerous cameos in label mates Astro's predebut online web drama To Be Continued.

Elly (as Jung Hae-rim), Choi Yoo-jung, Kim Do-yeon, and Sei (as Lee Seo-jeong, then under LOUDers Entertainment) competed in the Mnet survival television program Produce 101, which aired from January 22 to April 1, 2016.

Choi Yoo-jung and Kim Do-yeon were ranked in the final top 11 contestants and debuted in the project girl group I.O.I.

In November, according to Gaon Music Chart, the EP sold over 47,000 physical copies since its release, marking the highest-selling album by a girl group that debuted in 2017.

[20] On November 18, 2021, Weki Meki released their fifth EP, I Am Me., featuring six songs, including the title track "Siesta".

[30] On August 16, Fantagio announced that Weki Meki had ended their activities on August 8, and that members Elly, Sei, Lua, Rina and Lucy also departed from the agency following the expiration of their contracts while Ji Su-yeon, Choi Yoo-jung and Kim Do-yeon were still in discussions regarding a renewal of their contracts.

[3] On November 18, after discussions, Ji Su-yeon has chosen to part ways with Fantagio, while Choi Yoo-jung and Kim Do-yeon renewed their contracts with the agency.