BTS - 2 Cool 4 Skool BEST Shaboom and Siren

Shaboom and Siren

- Photobook A

How Sweet is driven by Miami bass inspired production

released in 2021 as a continuation of the group’s BORDER series

while also revisiting fan‑loved songs from the earlier Hwa Yang Yeon Hwa releases

BTS - 2 Cool 4 Skool BEST Shaboom and Siren2 Cool 4 Skool is the debut single album by BTS, released on June 12, 2013 through Big Hit Entertainment. The album marked the official debut of the group and introduced their hip hop focused sound and socially conscious themes. Featuring nine tracks including two hidden songs, the project was promoted with the lead single No More Dream and the follow up track We Are Bulletproof Pt. 2. Musically, 2 Cool 4 Skool blends hip hop and K pop influences with