So I was just reading this novel yesterday but I already forgot the title♀️, It's a Korean fantasy(?) novel, the main character is male, and Bern used to be his name, he's a prince as well and a knight. He got killed in the first chap. During a war and when he woke up he found himself in another man's body, it turns out the body he's possessing is the third prince of the enemy kingdom.(the kingdom they faught) and he went back to the past. He assume that his brother -chase- used the artifact that can turned back the time a treasure in their kingdom, He got black hair and red eyes, the orig. owner of the body is a coward, and he's gonna die a few months later on due to 'suicide', I forgot the main character name sorry, He have 2 brothers, the first brother is Randall, he's just an observer The second is Franz, the mc hate him cause his an asshole, the prince and his mother (the queen) despise the MC because he reassemble his deseased mother. And he have an archmage by his side, ahhh, sorry for my english, I tried my best