Choi Sang-in is one of Jin-soo's closest friends and holds information about the woman Jin-soo loved before losing his memories. He recalls that Jin-soo finally met her just before leaving for military service and urges him to continue searching. His account helps Jin-soo recognize the depth of the lost relationship, even though it does not fully reveal the woman's identity.
Jung Chan has 12 screen credits in a career dating back to 2002. Signature works include Loveholic, Possible Changes, Wi-do. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.
