[4] At Strawberry Milk's debut press showcase, Way said, "It was my dream to become a singer since I was young.

"[5] Strawberry Milk performed "Let Me Know" for the first time at the First Chrome Family in Japan Concert on October 4.

It received one million views on YouTube in less than five days, and ranked high on China's YinYueTai V Chart.

[8][9] The beginning of the music video depicts Choa and Way transforming into Tetris characters and falling into a pink room.

Scott Interrante, writing for PopMatters, described "OK" as an "overly saccharine Hi-NRG dance song filled with cute vocals, adorable imagery, and a biting wit."