The 'Tardiness Prevention Live' series is a series similar to 'School Attack' in that idol groups pop in for surprise performances at schools throughout the country. However, in order to promote tardiness prevention, the auditorium doors close promptly after the bell rings for school, and those who are late must stay outside wondering which idol group has come to visit their school.

For this episode, once the clock struck 8:30AM, UNB emerged on stage to perform their title song "Feeling". Afterward, when the tardy students were finally let in so they could show their faces to the rest of the student body, an unexpected occurrence happened.

UNB's maknae Kijoong stated that he saw a friend in the group of tardy students, and went off-stage to fetch him. It turned out Kijoong and the tardy student went to the same middle school, and Kijoong remembered that this particular friend often photographed the idol while the idol sang at school. On the other hand, the friend recalled that during Kijoong's middle school days, the idol was extremely popular, was the best singer at the school, and was very handsome.�

Watch UNB's 'Tardiness Prevention Live' above.