"The Rhythms of day and night. Two Different words coming from two opposite poles, mingled during this time."
"You gave me a new life," "You taught me to have wings," "You made me begin"
If you don't understand, this is basically all about jungkook's relationship with meeting the members. but the real thing is. Back in the 2015 Hyyh Era (The Most Beautiful Moment in Life) Suga and Jungkook made a promise to stay together no matter the problem was. During in the RUN MV scene, (second verse after the chorus) Suga got drunk and later they both had a fight which caused them to seperate. Jungkook in the EUROPHIA MV also saved Suga in his house that was burning and the same lighter in the I NEED U MV. They had broken their promises and lied, then seperated. Jungkook's logo is a wing's feather but not a full one because the members made and teached him how to "Begin".
Idk if im wrong or right but this theory looks identical to the film.