I Was Reincarnated as a Tyrannical Villainous Noble, but Since I Don’t Want to Die, I Master Dark Magic That Should Not Be Able to Heal People and Save the Ailing Heroine. ~ When I Cared for the Frail Yandere Heroine, It Wasn’t the Protagonist but I Who W

Native title: 暴虐な悪役貴族に転生したが、死にたくないので人を癒せないはずの闇魔法を極めて病気のヒロイン救います〜病弱なヤンデレヒロインをケアしたら主人公じゃなくて俺が溺愛された件〜