It was released on January 20, 2025, by WakeOne, serving as the first single from Blue Paradise, the band's upcoming fifth Korean-language EP.

[3] The following week, promotional concept photos in a bright Valentine's Day theme were released, showing the band's members in a pink color palate and posing with Love Hearts candies.

[4] The song's cover art, illustrated by Japanese horror manga artist Junji Ito, was revealed the next day.

[8] The song's lyrics, which revolve around the band begging a doctor to heal them of their lovesickness[9] and liken the feeling of first love to a hot fever,[10] were written by Bang Hye-hyun of songwriting collective Jam Factory, Aaron Theodore Berton, and Matthew Robert Crawford.

[13] In the music video, which was released concurrently with the song on January 20,[13] each member of the band is shown with different love-related ailments that they ask the doctor to fix.

[15] The donation was said to be part of a campaign to allow K-pop fans to "easily participate in social activities", and "give the gift of a warm winter to those in need".