B2ST is already one of the biggest boy bands in K-pop, but now it looks they've produced a viable solo superstar in member Yoseob. The 23-year-old, who is known for his sweet vocals and baby-faced good looks, has shown remarkable longevity on the charts since releasing his debut solo album, The First Collage, in late November. Lead single, "Caffeine," peaked at No. 2 on the GAON singles chart, and has yet to leave the top five. It's spent the past three weeks lodged comfortably at No. 4, and is still selling well on the digital charts. It's also still in the top 10 of the Instiz iChart (a real-time chart that aggregates all the various digital sales in Korea as they happen and ranks them accordingly), and only slipped out of the top five due to the release of the latest Infinity Challenge compilation, which is currently dominating most of the top 10. With sales for most of the Infinity Challenge songs now losing steam, "Caffeine" should climb back up few spots in no time, extending its shelf life even further.
It's not hard to see why "Caffeine" has become so big. B2ST's ballads always do extremely well (even outselling their main dance-pop singles) and "Caffeine" is one of the best ballads that's ever come out of the band. Yoseob is also a huge part of the equation: the boy oozes charisma, and his recent live performances have been nothing short of wonderful.
With the success of B2ST's last album, Midnight Sun, and Yoseob's solo debut, it's safe to say that the band's next comeback could be their biggest yet.