This play is adapted from the Douban reading serialized novel "There is a Red House Under the Tree", the author Xiaoge.　　Chen Huan'er, a girl from a small town, moved to the big city with her parents, and she and her two new partners, Jing Qichi and Song Cong, went through all the important nodes of their lives together from high school, to college, and then to graduation. During this period, there are ordinary and trivial days such as reading, outings, sports meetings, and book rafting, as well as the sourness of secret love, the unwillingness to die of ideals, the unpreparedness in the face of family changes, and the confusion and pain of facing the death of relatives for the first time...... These three young people supported each other through the throes of growth, and grew from ignorant teenagers to adults who integrated into this society. In the end, they grow into a completely different version of themselves than they imagined in high school, but also good enough. Of course, the most important thing is that they are always by each other's side and never separated.