Yup he is a son of a bitch...spoiler.
In one of her last life, he succeeded in seducing her and taking her away to his place after that he acted like he loved her but in fact he never did in the end she died while running away
WHA-
Mhm u heard me....spoiler
They her family sent her a secret message saying they were waiting for her return and she escaped with the people of her family but while running that son of a bitch side noticed that she was gone so he went after her and a bloody battle took place in that moment the carriage which she was in went out of control I think? Due to the monsters and she used her powers and that sudden use burst her heart and her carriage overturned in the end the bastard side won and he reached her and looked down at her with a very cold look and that was the last thing she saw before she died due to her heart bursting.
Daym das so sad heck I hope this time she achieves happiness
She will.
so he leaves his fiancee for her sister who has the powers? so he's aiming for social power to use the spring power? does she look like a puppet to you? definitely not the ML. Rather, he seems like that annoying male douchebag that the only thing giving him worth in the story is his title, attractive looks, and toxic personality that makes the plot more interesting （￣へ￣）if I'm wrong and I'm just judging quickly, then I apologize lmao