After becoming leaders of both the hyperpop and digicore genres, the frequent collaborators recorded the EP at an Airbnb homestay in North Carolina and a studio.

[1] According to the Chicago Reader's Leor Galil, Glaive typically prefers Midwest emo guitars mixed with energetic electronic production, while Ericdoa usually favors dreamy synthesizers and sharp hip hop beats.

[1] The following song, "Mental Anguish", sees the duo harmonizing its title during the hook, which was compared by Sundaresan to moments from Ericdoa's album COA (2020).

[1] Steve "Flash" Juon from RapReviews wrote that "Heather" contains "electronic production", "artificial drums", "vocoded vocals", tempo changes, and "whiny complaints".

[11] Sundaresan thought that the final track, "Fuck This Town", contains "darker, dancier rhythms" and a "perfectly dejected chorus mixed so that it flashes like strobe lights over the drums".

[4][6][9] Glaive and Ericdoa embarked on the Then I'll Be Happy Tour across North America with support from Prentiss, Aldn, Underscores, and Midwxst throughout October and November 2021.

[13] Sundaresan said that Then I'll Be Happy is "frustratingly safe and directionless" and that while Glaive and Ericdoa are captivating solo artists, they "aren't yet distinct enough to complement each other in interesting ways".