Amor Certus is a webtoon by Woo-Suk Yang and Gang-Hyuk Lim.
Young unlicensed doctor, Jiso Choi, learned medicine from his father. In little China, where law lacks presence, a triad leader asks Jiso's father to perform a FLC surgery on a beautiful woman. FLC is a chip that can make anyone fall in love with another by imprinting one's unique brain frequencies. However, Jiso falls into a dangerous love with the triad leader's woman and things get out of hand for him and his father...