@Meybi
There always something more to the story in these type of stories.
Can you please stop saying c'mon? For some reason it irritates me and I don't know why.
Honestly, I don't trust what happened in her past life... Since they intentionally didn't show him, I feel like he had no idea what was going on, and MC will find out at the end that he never betrayed her, she was just made to think he did.
Wait I have already read a start like this. The same reincarnation which traumatized the heroine and the fallen hero which actually was brainwashed by the divine powers given to him.