Hong Seung-han, known mononymously as Seunghan and professionally as XngHan, is a South Korean singer under SM Entertainment. He is a former member of the boy group RIIZE. He left the group in 2024 and debuted as a soloist in July 2025 with the release of Waste No Time under the stage name XngHan&Xoul. First introduced in July 2022 as a member of SM Entertainment's idol training team SM Rookies, Seunghan debuted in September 2023 as a member of RIIZE. Amid leaks and criticism regarding his personal life, Seunghan took a hiatus from the band beginning in November 2023, briefly returning in October 2024 only to withdraw permanently two days later amid backlash from a subset of the band's fans.