故事讲述举目无亲的女孩兰堂梨乃受到神秘笔友“波比特”的帮助，顺利转入财阀学校“宫神学园”，那是一所私立的全女校。她第一天报到就离奇地加入了受学生倾慕、代表学园最大权限的学生会──“宫神学园极大权限保有最上级生徒会”，简称“极上生徒会”。此后她和朋友们一起在校园内为解决各种麻烦而努力。宫神学园以学生自主作为办学理念，比教职员更有权势的极上生徒会为此而设立。学生会成员享有许多特权，不但学费全免，更可免费入住专用宿舍“极上寮”，因此很多人渴望加入，可是并不容易。学生会按职能设有执行部、隐密部、游击部及车辆部。会长神宫司奏是个才貌兼备的完美少女，她认识梨乃死去的母亲，可是梨乃并不知道；副会长金城奈奈穗、银河久远，隐密部负责人桂圣奈，会计市川真由良，随故事的展开，她们每人不为人知的故事将一一展现在观众面前。故事轻松、搞笑又不乏有待深层挖掘的谜，女孩之间的关系十分微妙有趣，配音员也专门请了当红的百合界名人。
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