初二三班最调皮的“差生”王强和“严格班主任”石妙娜意外的互换了身体，压迫已久的王强过了一把当班主任的瘾，石妙娜也体会到了做“差生”的滋味。石妙娜的公开课比赛日期临近，二人急需找到换回身体的方法。

Wang Qiang (Xing Yuanyuan), the most naughty “scumbag” in the third class of junior high school, and Shi Miona (Wang Bowen), a cranky homeroom teacher, accidentally swap bodies. Wang, who had been oppressed for a long time, got a taste of being a homeroom teacher, and Shi also experienced the feeling of being considered the “school scum”. As the date of Shi’s open class competition is approaching, the two urgently need to find a way to change back into their bodies. But first, they’ll have to overcome numerous obstacles…

茶啊二中第四季暖心归来：这里有老师恨铁不成钢的怒骂，同学间的支持与帮助，情窦初开的羞涩，懵懂成长的磕绊，梦想的思考...在欢声大笑的同时，也默默落下泪来。或许，这就是青春，或许，这就是成长，轻松中总是夹杂着一丝温情，乐观时也经常面临着绝望。但正是这样，才让我们有着继续前进的动力，在任性的青春里放肆的歌唱。