Each point is a rolling 30-day score ending on that date, sampled weekly. May differ from the window composite above.
BSS, also known as BooSeokSoon, are the first sub-unit of the South Korean boy group SEVENTEEN, under Pledis Entertainment. The trio consists of Seungkwan, DK, and Hoshi, with the unit name formed from their Korean names (Boo Seung-kwan, Lee Seok-min, Kwon Soon-young). BSS debuted on March 21, 2018 with the digital single "Just Do It," leaning into a bright, comedic, feel-good concept that set them apart from SEVENTEEN's main releases. After a long gap, the unit returned with the single album "Second Wind" on February 6, 2023, whose lead single "Fighting," featuring Lee Young-ji, became a sizable chart hit in Korea. They followed with the 2025 single album "Teleparty" and its track "CBZ (Prime Time)." As a third-generation sub-unit, BSS are known for upbeat, humorous releases that showcase the three members' vocal and performance chemistry within the larger SEVENTEEN framework. "Fighting" in particular gave the unit a mainstream chart hit in Korea, broadening their profile beyond SEVENTEEN's core fandom and demonstrating the commercial reach of the group's sub-unit system.