该剧讲述了“程浩”和“陆鸿渐”双男主在平行空间互换身份，与迷妹林小小所发生的故事。

半熟，是对青春期最合理的定义，它是梦开始的地方，没有深思熟虑，只有最单纯的坚定，然而，在这个充满意外的年纪，未来似乎变得很具体，又有着无限的可能性。这个故事里有女汉子与呆萌校草的啼笑初恋，有四朵姐妹花的袍泽之谊，也有学霸乖乖女与双胞胎才子的意乱情迷，他们躁动的热情在循规蹈矩的理智中突围，写成一首欢笑与痛，梦想与爱的青春禁曲。
也许，半熟与成熟之间，只差那次铤而走险的“叛逆”。

Botak, the son of a coffee shop owner, is secretly in love with tomboy Fighting Fish, who has grown up with him since she and her mother came to live with them a decade or so ago. Angry at her mother for deserting her no-good father when she was still young, Fighting Fish sets out one day to find him, with Botak in tow.