Eun-gi's eventful life in a boarding house has begun with the three ladies: a sexy owner of a boarding house, her daughter who is even sexier, and his innocent first love. Eun-gi, a freshman, has found his new place in a boarding house operated by mother and daughter when he came to Seoul to study. His only pleasure is to play along in the unspoken push-and-pull relationship with the mother or the daughter. One day, his first love, Soon-yi, who is innocent and docile, suddenly comes to visit him at the boarding house. With the sexy daughter of the boarding house behind the door, and the curvaceous lady owner of the boarding house in the bathroom next to his room, the 20-year-old virgin Eun-gi's sleepless night begins.

故事发生在二十世纪四十年代，玉卿嫂（杨惠姗 饰）应聘成为了桂林一大户人家的奶妈，负责照料和抚养小少爷容哥。玉卿嫂个性温柔但是坚强，模样又生的俊俏，深得容哥的喜爱。对于容哥提出的一切要求，玉卿嫂都无条件的满足他，只有一点，那就是玉卿嫂从来不带容哥回自己的婆家探望。一天，容哥偷偷跟踪回婆家的玉卿嫂，发现她来到了一桩陌生的房子前，去见一个名叫庆生的男人。玉卿嫂告诉容哥庆生是自己的干弟弟，他的吃穿用度全部都要自己来供养。容哥很快就和庆生成为了朋友，他带他去看戏，而庆生居然爱上了刀马旦金燕飞，这让玉卿嫂非常的伤心。

当所有的年轻男孩满脑子想的都是「性」时，你要怎么保护自己的女儿呢？道格（汤尼丹萨 饰，电视影集「妙管家」）是一个标准爸爸，如今，他面对了每个爸爸的恶梦----- 吾家有女初长成 ！Doug Simpson is an average father who has to deal with his teenage daughter's transformation into womanhood. And as every teenage boy around her answers the call of their over-active glands, Doug has to wage a one-man war to protect his daughter from them! His efforts send him on night-spying missions, to an explosive drag race, and eventually to jail as he learns what every father with a daughter learns – that sometimes you have to let go to keep the ones you love.

天知茂主演“明智小五郎美女系列”第一部，根据江户川乱步小说《吸血鬼》改编