The 2nd single from timelesz under their new lineup. This work is the first pop ballad single from timelesz under their new lineup. It is a song characterized by a beautiful yet fleeting melody and lyrics that compare the miracle of meeting to fireworks, and it is a love song with a bittersweet yet warm theme: "Fireworks fade away, but the memories we shared together live on in our hearts." It is a song that adds color to summer memories, so please look forward to it. Limited Edition Type B contains "Tarinaiya" as a B-side track. The DVD contains special variety video 1 (title subject to change). Comes with original trading cards ver.B (two cards: one group design + one randomly selected from four double-sided solo designs) and a playlist card with an application code (included bonus common to all editions). *With the application code printed on the "playlist card" enclosed in each edition, you can enjoy the songs through the music player function in the "timeleSZ app" (system requirements unknown). *The songs included in the purchased product can be played. *-Inst- tracks are not eligible.