Tang Ciyou, the squad leader of Class 3, Grade 1 of Xingzhou Middle School, her childhood sweetheart Shen Qingli and the sister adopted by the Shen family, Shen Zhuxin, came to the Liyuan Galaxy by chance and met Lin Yitang, a freshman at Longyue College, and became best friends. The subsequent adventures made Tang Ciyou and Shen Qingli understand their intentions, but due to various reasons, they became each other's "guests"
Intention: Not all two-way trips will be successful.