In season five, Penny and Leonard's relationship is relaunched in full "beta test" mode, while Sheldon, Howard, and Raj discover the feminine mystique is something that cannot be easily graphed or calculated. As Sheldon makes begrudging amendments to his "Relationship Agreement" with his "friend-who-happens-to-be-a-girl" Amy Farrah Fowler, Raj contemplates an arranged marriage, and Howard is all-systems-go for both is NASA space launch and wedding to the spirited Bernadette.

University physicists Leonard and Sheldon know whether to use an integral or a differential to solve the area under a curve. But they don't have a clue about girls. Or dating. Or clothes. Or parties. Or having fun. Or, basically, life. So when a pretty blonde named Penny moves in the apartment across the hall, the guys decide to get an education outside of the classroom. Boys, you have a lot to learn.

Worlds collide in Season 3! A love affair with Penny has opened a big, wide, wonderful world of romance for Leonard. But Sheldon likes the world just the way it was, thank you. All of which makes for a zany comic triangle with brainy, clueless Sheldon and practical, grounded Penny hilariously vying for the role of hypotenuse.

孔姬智（张娜拉 饰）是一个活泼开朗，充满古怪招数的女生，自从看到旅行社高层金贤俊（朴正哲 饰）后，芳心暗许，认定了他就是自己的白马王子，展开了离奇古怪的求爱大攻势！
姬智潜入金贤俊的酒店，偷走他的笔记本，并因此闹出了一场场笑话。还未夺得美男欢心，她决定不达目的誓不罢休，古灵精怪的求爱招数层出不穷。就像是金贤俊的影子，无论他在哪里，姬智都会随时出现，让金贤俊头痛之余，也认识到姬智善良可爱的一面，金贤俊情不自禁对这个主动得过分的女生隐隐心动。
然而，姬智的求爱计划就这么轻而易举的成功了吗？要抱得美男归，恐怕还要有点曲折和考验呢。