Hyeongseok (형석) is a South Korean singer and rapper under KINGTOP Entertainment. He is a member of the boy group ASTIN. Official link Instagram This article is a stub. You can help Kpop Wiki by expanding it. Retrieved from "https://kpop.fandom.com/wiki/Hyeongseok?oldid=148708" Categories: 2000 births September births Person article stubs Singers Male singers Rappers Male rappers ASTIN Hyeongseok Community content is available under CC-BY-SA unless otherwise noted.