If you are thinking whether u watch it or not, just go for it. its worth watching. i just finished it just two days. as i love happy endings its one of them. The male lead i was fallen for him since his drama our secret (its also worth to watch) so i really wanted to see him in more dramas as his acting is so cute, childish, nice and many more and for shen yue i like her since meteor garden, a love so beautiful. Through the episodes i laugh, cried ,got emotional and in the happy. so if you are looking for romance, fantacy, light weighted, freshen up mood, its the one. The main leads are looks promising each other and had vey nice chemistry between also the second lead i would say i like them as well as their characters are also potrayed nicely. The episodes are not available in english on youtube so u can watch it on bilibili tv. enjoy

edit:- story line (time travel & high school romance) may you think its common in chinese dramas but its nice to watch them with hoping happy ending. i dont usually watch dramas with lots of logic i just enjoy the series as its most matters to me because they make me happy. hope you find this drama enjoyable.