
Accolades Award and nominations for "Dumb Dumb" Somi also held a comeback live stream on her official TikTok account. On the same day as the song release, an online media showcase was held for Somi to celebrate the release with JooE from Momoland as the MC. It gained ten million views in just a day. With some eye-catching animations inserted in the middle, the music video felt like a teen movie. At the end of the video, Somi looks happy after receiving the man's confession.

Turned out, both of them were pretending to play "dumb" so they can approached with each other. It features Somi, who appeared as a high school student that falls in love with one of the most handsome members of the sports team at lunchtime, and then goes into operation to get a confession. On August 2, the official music video was released. On July 30, the music video teaser was released. NME 's Rhian Daly gave the song a two-star rating calling it "frustrating and underwhelming." She commented how "Dumb Dumb" could be stronger if it was given time to develop "but at two minutes and 30 seconds, it's over before it really gets going." Although reviewing the song negatively she called the "chorus' dirty bass" and "Somi's accompanying shift into her lower register alluring and arresting." Yeom Dong-gyo of IZM gave "Dumb Dumb" a two and half star rating and said the song "blends the boldness of " What You Waiting For" and the freshness of " Birthday". Jeon attributed the longer wait between comebacks to this recording process and vouched it makes the result good.

The original lyrics to the hook of the song were "Imma say it like it is/ cut the bullsh*t/ you dumb dumb" in the official version, they have been translated to Korean. On August 2, "Dumb Dumb" was released digitally at 18:00 ( KST). On August 1, a credits poster was unveiled revealing the Somi was involved in the songs's writing. On the next day, they released the fifth promotional poster. On July 28, the fourth promotional poster was released.

On July 26, the third promotional poster was released. The following day the second promotional poster was released. Then, they released first promotional poster on July 23, that revealed the format as a single, it also included the song's release date and the title of the single "Dumb Dumb". On July 14, 2021, The Black Label confirmed that Jeon Somi would make a comeback, though it was unclear whether in what format the comeback would be.
