Actor Song Joong Ki confirmed to come out in singer Kim Jong Kook's music video, proving his loyalty to their friendship.

Song Joong Ki has been busy with his drama "The Innocent Man" and the movie "Wolf Boy", but has promised to come out in Kim Jong Kook's music video for his new album despite the busy schedule.

Even though the filming took a long time from early in the morning until late in the afternoon, he took care of the concept in a detailed manner for a perfected acting, arousing many compliments from the staff members.

Song Joong Ki and Kim Jong Kook had built up their friendship when they came out in SBS "Running Man" together, and other cast members of the show, Haha, Gary, and Lee Gwang Soo, also are helping out Kim Jong Kook with this album. Haha and Gary are featuring for Kim Jong Kook's new song, and Lee Kwang Soo visited the music video filming site.

Kim Jong Kook's new album will be released on November 1st.

Photo Credit: Twitter