'Going by the book', 'South of the border', 'The big scene', 'No blood no tears', 'Silmido', 'The big swindle', 'Hanbando', 'Guns and talks', 'Good morning, president'. These are some of the movies music director Jae-Gweon has been in charge of. A man of substantial ability, he has been working with renowned Korean movie directors such as Jang Jin, Kang Woo-Seok, Choi Dong-hoon, and Ryoo Seung-wan. Not only that. His genuine interest in theater and deep understanding have also had great influence on live-stage performance music, though the death of the actor Park Kwang-Jeong made him take some rest from theater. He believes that the beauty of the performances resides in the tastefulness of on-site live music, enough reason for him to personally go on-site whenever it's necessary. Back stage or in rehearsal rooms where music is subtly or even hardly perceived, Jae-Gweon likes to observe how the audience reacts. Movie director Jang Jin says Jae-Gweon's music is "an excellent co-actor" while Kang Woo-Seok compares it to a "gisaeng" (female entertainers of the Chosen dinasty era). For him music is not about sounds but about minds.