An*l Surgery Anonymous Bulletin Board, also known as 항문외과 익명게시판, is a captivating Korean web novel that delves into adult themes with a mix of drama, mature content, psychological exploration, smut, tragedy, and yaoi relationships. The novel, tagged as R-18 and involving threesome dynamics, offers a unique and intense reading experience for those interested in a blend of complex emotions and relationships within a digital bulletin board setting.