Actor Yoo Ah-in has signed with a new agency just days after confirming his return to the big screen, signaling a full-fledged comeback more than three years after a drug scandal derailed his career. Agency Billions announced on its official social media channel Friday that it had signed an exclusive contract with Yoo, acknowledging concerns surrounding his past legal troubles and decision to resume acting. "We take seriously the concerns arising from Yoo Ah-in's past case and his recent return to activities," the agency said. "Before signing the contract, we had a number of candid conversations with him over a long period of time and gave deep consideration to the responsibility and attitude required for him to resume his career as an actor, as well as the direction he should take going forward," it said. Yoo was sentenced to one year in prison, suspended for two years, for violations of Korea's Narcotics Control Act and other charges. His contract with his former agency UAA ended June 30, amid reports that he was considering a role in director Jang Jae-hyun's upcoming film "Vampir." Atte