Guardian Sweetheart's Dark Night Blood Metamorphosis

Based on the world view of "Guardian Sweetheart", it combines the setting of pure-blood vampire royal family, vampire hunter, and vampire faction struggle. The protagonist was originally a popular guardian of Holy Night College and the last descendant of the vampire royal family. After being betrayed by his close friends and companions, he fell into the forbidden land of the vampire family. He awakened the true vampire power and darkened Guardian Sweetheart. After a hundred years, he returned as a blood emperor to avenge all betrayers and regain the trust and dignity that had been trampled on.