This is a short and sweet novel. I MTL-ed most of this novel, and for the most part, it is very understandable.
The novel alternates between the past and the present, with MC traveling back in time to possess the body of ML's step-sister. The first time ML met her, she had already taken over the body of this sister (who died of health issues). So ML only knew MC as his sister, and not the original.
Their relationship was sweet. MC was very endearing in her emotions and actions, wanting the best for ML. She did a lot of help him overcome the scars of his trauma, and help him move forward and adapt back to society. Her open, lovely, sweet and strong personality made her loved by her family and her friends.
MC realises that she is in a novel, as a cannon fodder. ML is the villain. Although that fact that they are in a novel doesn't really impact on the plot much. The og heroine is also aware that they are in a novel. She actually approaches MC to talk about this, when she realises that MC is the only one who is not following the plot of the novel. They both work hard to change the plot and defy their predestined fate. ML realises, or starts to suspect, that MC is his first love after their second meeting. Which I love. She is blocked from saying anything about her identity, and so she is resigned to her fate that he will never recognise her. But that does not stop her from chasing after her love. ML still notices though. The foods that she hates and her little idiosyncrasies that belong only to her. He notices it and by their fourth meeting he is sure, and from then on he makes his moves on her.
My only issue is that we don't spend too much time in the past. But neither do we spend too much time in the present. She kind of spends an equal amount of time in both and this neither are really fully developed and explored.
Spoiler about her death in the past and ML's trauma:
Spoiler
ML's foster parents, who abused ML while he was with them, kidnapped MC and ML for randsom, but they intended to kill both of them anyway. MC manages to knock out the foster dad while he is beating ML. She tries to escape with him but they run into the foster mum, who stabs MC in the stomach with a knife. The MTL is not too clear on what happens after, but I think they fall into a lake and die or something like that. ML suffers from PTSD and guilt after that, so he needs higher care in some sort of institution as he gets nightmares and becomes crazy because of what happened.