UQ Holder!

In 2086, the existence of magic has been known to humanity at large for about a decade, during which this reveal caused major upheaval throughout the world. Konoe Touta is a former human who, when his life was hanging by a thread, was saved through being turned into a vampire by the centuries-old, true-blooded vampire Evangeline Athanasia Kitty McDowell, such a powerful and infamous dark sorceress that few who knew of her far-reaching name would not shudder in fear upon hearing it. However, not all about the legendarily strong Evangeline, who now normally goes by the name of Yukihime, is fear and destruction, as she is one of the founders and the current leader of a self-protection society of non-human outcasts named UQ Holder. In order to protect and train Touta, who, in addition to becoming a vampire, had also lost his parents, she took him with her and brought him into her organization. Now it is up to Touta to become strong enough to protect himself under her tutelage. — written by Hinoe * Based on the manga by the same name by Akamatsu Ken serialised in Weekly Shounen Magazine.