Does this really classify as edgey?
I'm pretty sure most people who were literally betrayed and murdered, if given a second chance, would be enraged. I imagine the trauma caused by it would be a whole different form of PTSD, too.
Only reason I ask is because I've read the LN, and the mc is surprisingly straight forward about his intentions, even after his 'harem' forms. They're way more psychotic than he is. Future Diary levels of yandere. And the people he's targetting are beyond help. They're legitimately evil people. Especially the female mage who wanted to use him as parts.