因被人诬陷谋反而没落的官宦家之女，在女扮男装卖书糊口的过程中，与拥有帅气外貌的神秘书生相识后展开的故事。最后她发现原来这位神秘的书生是吸血鬼，而且在朝鲜宫中还有邪恶的吸血鬼存在。
该剧改编自作家张鼻猪的同名人气动画片，讲述20多岁的青春和韩国军队独有的秘密和不合理之处。
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…
