As the name "Back mirror" suggests, this song sings about a scene of driving through the neon-lit 246 with the night wind cutting through the night air. Feeling the slightly chilly night breeze, the song goes out into the city with the song "freedom". The song delivers a message of "let's just live the way we like without being influenced by others" in its relaxed and relaxed rap and singing voice and lyrics. The title "Back mirror" also implies that Gear 2nd, which is scheduled to take a break after this album, is looking back and not looking back, but is projecting its past trajectory in slow motion, just like a runner's lantern. This work should be listened to on a night drive or when you want to immerse yourself in an emo feeling. The artist self-produced the lyrics, beat-making, recording, mixing, mastering, and all other artwork. As a songwriter, he has provided songs for various major artists such as Kana Nishino, 48, GENERATIONS, from EXILE TRIBE, Kis-My-Ft2, and Korean artists.