A world where a trancidential (person who can use magic) is born in each noble family per generation. But everytime they use their powers they slowly loose their sanity and can kill anyone.
Dahlia was reincarnated into a dating game as a sister of Cedric, one of the ml in the game and a trancidential. Dahlia had never met her brother until the day their parents died. The reason for this was bc the mother was scared of the cedric so she kicked him out of the house. Cedric who disliked his sister bc of jealousy that she received all of their parents love. But as time went on, his affection towards her grows as dahlia continues to give him the love he had always wanted.
*Dahlia has the power to calm down a trancidential who is about to go bersek which was never possible in the history of the empire*
The Strongest Characters in the World are Obsessed With Me