The song will be the soundtrack song of the Japanese movie Signal The Movie. The teaser for this song was released on March 25, 2021.
The movie is a remake of a Japanese TV drama, Signal ( originally in Korean ), and in 2018 BTS wrote and composed the theme song — “Don’t Leave Me” .
This song marks the first collaboration with BTS with the Japanese rock band back number and Iyori Shimizu.
