I’m blessed and Cursed

In Suntopia, 18-year-old Ryuzaki Kokutō is the last Black Knight, born both blessed and cursed. He can summon goddesses, monsters, and swords, but no other magic, while the demon queen sealed inside him grants infinite mana he can transfer to his summons. Monsters hunt him every day, because his death would release her. Calm, confident, outgoing, and nearly impossible to keep down, Ryuzaki Kokutō enters Sun University, where gifted young mages study magic and his impossible fate begins to draw attention.