31-year-oldLinYangisgreatatherjobbutstilllivesalone.Herlifeiscurrentlystablebutboring.24-year-oldLuZheng'an,heryoungerchildhoodneighbor,suddenlyreturnsfromstudyingabroadandentersLinYang'sworld.Their24-hourinteractioncompletelychangesLinYang'slife.WithLuZheng'an'scare,she"mentallyagesbackward",andtheybeginmarchingtowardshappinesstogether.Fromayoungerbrothertoaboyfriend,fromgrowinguptogrowingoldtogether,helearnstoberesponsibleanddependableforher,whileshekeepsayoungerheartandlearnstorelyonhim.Eventhoughlifeishard,I'mthankfultohaveyouasmysweetie.