BTOB, the 10th year of debut ‘Insider group in the music industry’ is back. They have been consistently loved by the public and K-pop listeners for 10 years with their unique music world. BTOB, which has delivered warm comfort and love to many people through numerous hit songs such as ‘I miss you’, ‘I can’t do without you’, ‘Beautiful and painful’, etc. BTOB will provide sympathy and comfort to all those who are tired of everyday life with the new song ‘Outsider’. ‘The Outsider’ is a song that can once again imprint BTOB’s limitless musical spectrum to the public. The secret to BTOB’s long run for a long time is that they are always challenging new things with a variety of concepts. BTOB overcame the idol’s representative jinx ‘7 Years of Evil’ and continued their activities for 10 years, continuing their challenges. Despite everyone’s concerns, BTOB once again captured the hearts of fans by enjoying a stage with a different concept each time and the stage itself. Fans who have been with BTOB for a long time are the reason and driving force behind BTOB’s 10 years of success.