Wouldn't you know if I did XX?

Summary

Runner's High's leader Jae and rapper Bumjun boast a chemistry that's renowned not only among the group but also among fans.However, Bumjun realized that he liked Jae beyond their friendship, and he wrote a solo song to express his feelings. Bumjun was curious about Jae's reaction to his self-composed song, but he didn't have any particular expectations.But...when Bumjun asked about his feelings, Jae suddenly dropped a bombshell:"Wouldn't you know if I XX?"