简介：一艘豪华游轮上，当年的“辣妹儿”朱婷（施予斐 饰）为毕业多年的大学同学组织了一场盛大的十年聚会。同窗再见感慨良多，这时朱婷却含泪道出了这场聚会的特殊意义，昔日的死党们不约而同回忆起那些年一起走过的疯狂岁月。十年前的大学里，围绕着“空心男”劲辉（张翰 饰）、“四眼波菜妹”周蕙（陈乔恩 饰）、“冯三套”冯松（王啸坤 饰）、“辣妹儿”朱婷展开了一段刺痛的青春故事：大学一开学，冯松便怂恿同学们各自写下心仪的姑娘的名字，大家立下“兄弟盟约”四年内不得侵犯彼此喜欢的女生，并保证不会追求其他人喜欢的姑娘。可是冯松喜欢的朱婷偏偏爱上了校草劲辉，而劲辉却偏爱发育良好的大胸女周蕙，一场关于友情爱情的青春争斗在所难免……──电影《既然青春留不住》由田蒙执导。
Introduce:On a luxurious You Lun, in those days " hot younger sister " Zhu Ting (Shi Yufei is acted the role of) for graduation old college fellow student organized 10 years of one parties with royal field. Fine of schoolfellow good-bye deep feeling is much, at this moment Zhu Ting is tearful however the special significance that spoke this party, in former days diehard followers people happen to coincide the has gone those years together mad years since memory. In the university 10 years ago, around move " hollowly male " interest brightness (Zhang Han acts the role of) , " younger sister of 4 wave dish " Zhou Hui (old Jon acts the role of) , " Feng San covers " Feng Song (Wang Xiaokun acts the role of) , " : The university terms begins, feng Song incites classmates to write down the name of the girl that admire in the heart severally, everybody stands below " brotherly covenant " the schoolgirl that each other must not encroach to like inside 4 years, assure to won't court the girl that someone else likes. But Feng is loose,liked Zhu Ting fell in love with officer grass unluckily interest brightness, and interest brightness favores a species of orchid of big tit female week with good growth however, a green combat unavoidable about friendship love...