Leo aka Hyunwoo is the ruthless, cold and important member of the Russian mafia pavel and also the only person s-io trusts. Hyunwoo and s-io have known e/o ever since they were in the orphanage and were adopted together. While s-io is pretending to be inlove with namsoon, The only person he thinks about is Hyunwoo but does Hyunwoo also think about him all the time?