In order to save his sister, he killed seven people in a row and was imprisoned! But in the prison, he encountered many adventures! There are wardens of special forces, financial geniuses who like to cheat, and soul composers who kill people with music... ...! After he was released from prison, he returned to Seoul, and for the sake of his amnesiac sister, he wanted to become the strongest idol. The half-baked skills he learned in the prison are actually quite enough! His composition made KARA popular in Korea, and Girls' Generation emerged from the Black Sea. Come back! Let TARA reach the pinnacle! He and Zheng Xiujing starred in 'We Got Married' and became a national couple, and he and Park Ji-yeon went to 'The Law of the Jungle' to become a national brother and sister! Finally kissed by Li Juli! But what he wanted was more, he was a bad lover, but a good OPPA!