This story is a bit sad but near the end MC will get revenge.

MC mother is a duke in other empire and MC have two younger brothers from her mother family. MC mother actually didn't abandoned MC but MC father took MC by force and threaten MC mother. MC father also very cruel and like to brainwashed MC. Like saying that her mother abandoned her and that her mother is a commoner. All the thing that MC father done to MC and MC mother is because of inferiority complex. MC father meet MC mother when MC father come to MC mother empire to study and make the two empire have a good friendship. But that didn't last long, so MC father back to his empire. MC mother is the one who fall in love first but MC father is a crazy jealous person. He feel superior when he can bring MC mother down because his family is weaker than MC mother family

The timeline is The fantasy world --> the modern world (korea) --> the fantasy world (now). First, MC died because of ex fiance younger brother. Then, MC reborn in modern world (korea) but she died in a fight with monsters. Now, MC got back to the fantasy world (now) which is her original world

The ML was someone who originally from modern world (korea). So the story is like this, first MC died in her original world then she is reborn in modern world (korea) where she become S-class guide. In the modern world (korea), ML become her esper. They're close to each other and ML is the first person to love MC. But later MC will died because of a fight with monsters. After MC died, ML didn't find a new guide. He used drugs to stay alive and he almost died once. He also travel around the world to search for esper that specialize in "dimensional travel". After he found the esper, he travel to fantasy world (original MC world) to meet MC. But to do " dimensional travel", he will have a chances of death and his soul will be shattered. After he succeed to come to MC original world, although he isn't dead, his soul is shattered. Well I'm too lazy to type the rest so just read the story.