On October 3 KST, the tracklist for LE SSERAFIM's upcoming 2nd album 'Antifragile' was released. The tracklist image revealed that the mini album will include a total of 5 tracks, including "The Hydra", "Antifragile", "Impurities", "No Celestial", and "Good Parts (when the quality is bad but I am)". In particular, Bang Si Hyuk was credited as a producer in the title track "Antifragile" and B-side track "Impurities", gathering interest.
Bang Si Hyuk was better known as a successful music producer before founding Big Hit Entertainment and eventually, HYBE Labels. Bang Si Hyuk is also known as the "father of BTS" and thus, his active participation in HYBE Labels artist LE SSERAFIM's upcoming album raised anticipation.