[2][3] He described "2U" as a hybrid of pop and hip-hop genres with a "gentle and comfortable" sound well-suited for spring, and MTV News pointed out the single had "R&B flourishes" as well.
[2][4] Writing for IZM, Hwang In-ho described it as house track incorporating a synth-based rhythm, R&B beats and slow tempo.
[5] As part of Grazia Korea's May cover story, Kang was asked if there was a specific reason for choosing groovy title tracks such as "2U" despite others thinking of him as an artist with powerful, strong performances.
Doug Riggs, Caspar von Winterfeldt, and Brian Scott Robinson headed the US crew.
[8] According to the Korea Music Content Association, Kang achieved a Gaon triple crown during the thirteenth week of 2020 in part due to "2U" ranking first in the download and BGM charts.