When high school teacher Na Aejoon shows up for work on an ordinary day, he never expects to bump into his favorite celebrity in the hallway. But when his school becomes a filming location for a show starring Choi Siyeol, his bias from the idol group A-One, that's exactly what happens! If that's not enough to give a fanboy a heart attack, Siyeol takes an interest in Aejoon and asks him to join the show as his "co-teacher." Desperate to keep his fan life a secret, Aejoon is forced to put his acting skills to the test, and not just on camera. But as he spends more and more time with Siyeol, the deception becomes harder to keep up. Not to mention, he might not be the only one keeping secrets…
此剧改编自日本电视剧《有钱男与贫穷女》，讲述一个患有面盲症的天才IT企业家，被热血开朗的新入职女职员发现其内心并逐渐恋上他的故事。
韩剧《精神病患者日记》讲述了陆东植（尹施允饰）偶然目击杀人现场后，在逃跑的过程中因事故失去记忆。看到自己手中握着的详细杀人过程日记，误认为自己是杀人狂魔的故事
