so the first few chapters, (maybe like 1-5) we're introduced to gu yan, our MC where she died and is transported back in time to complete a mission given by a system- this system is just probably an excuse for her to be able to travel back in time but whatever. So the mission is to save the villain big boss from blackening any further as a child. And she is transmigrated into the body of the neighbour of shen jiayu, the boy she has to save. At first, she tries to get close to him but fails but slowly she got secretly close to him. But one day, shen jiayu's adoptive parents found out about that and had a quarrel with and over her just because of that and she agreed to not continue feed him food since the mother told her to do so. She was feeling some guilt then she spotted the adoptive father abusing shen jiayu outside the corridor calling him names and hitting him, she rushes in to save him and threatens to call the police under the condition that she doesn't if he stays with her for three months. Then they have some fluffy cute moments after when he move in with her but one day, a man approaches them to bring back Shen Jiayu to his biological father, both are reluctant in the sense one is reluctant to leave him and the other is reluctant in returning back to the father's side since he had sorta grown attached to gu yan.

the next bunch of chapters up to c39, is where Gu Yan is transported back to her high school days when she had yet to die and is basically a bunch of interaction between the family, classmates, friends and so forth. A few characters would be like Ye Li and her b*tchy friend- Tang something I forgot, Song Yunshen, Gu Qiao, Zheng Shi (i think, the stepmom of mc) and the list carries on. MC and Shen Jiayu meet again not officially at a basketball match game thingie where Gu Yan spotted him playing basketball with some others. They do get together only towards like the thirties of the series tho