Fukushuu Kansuisha no Jinsei Nishuume Isekaitan THE COMIC

Five years prior, during winter, Kosuke Kurono's sister was raped and killed. After dedicating years to seeking revenge, he kills her murderer and decides to commit suicide. Instead of dying, he is reborn in a different world and gains the ability to use Black Magic, a power once wielded by legendary heroes. He is informed that his sister may have also been reborn in this world and begins searching for her.