Synopsis: My Bias Is Showing?!

High school teacher Na Aejoon never anticipates encountering his favorite celebrity, Choi Siyeol, in the school hallway on any ordinary day. However, when the school becomes a tv show filming location featuring Siyeol, from the popular idol group A-One, that's precisely what happens. Siyeol shows an interest in Aejoon, inviting him to join the show as his "co-teacher." Aejoon, desperate to keep his fan life under wraps, is compelled to test his acting skills, both on and off camera. The lies become more challenging to maintain as he spends more time with Siyeol, and he may not be the only one harboring secrets.