The Murderer Targets Brunettes

Reincarnated as a green-eyed brunette in the novel "The Murderer Targets Brunettes", Selenia knows that the murderer in question will be arrested within a year. To avoid being murdered herself, she holes herself up in her room until her adoptive father betrays her and has her sent to the mage tower. To her surprise, the master of the tower is Eon de Grandnoir, the very murderer she's trying to avoid! The tower is staffed entirely by green-eyed brunettes, who seemingly work there of their own free will. Can Selenia survive and solve the mystery in the process?

(Source: WEBTOON)