9x7 - Fairy Tail

In a flashback to over 400 years earlier, a young Zeref Dragneel studies at Mildian Academy in search of a way to resurrect his dead brother, Natsu. The school board eventually expel Zeref out of fear that his forbidden research will anger the god of life and death, Ankhselam; when Zeref still refuses to accept Natsu's death, Ankhselam afflicts him with the curse of contradiction, which kills everyone else in the academy and makes Zeref immortal. Consumed with guilt and self-loathing over his actions, Zeref creates the Etherious to assist in his suicide, using Natsu's preserved body to complete E.N.D., his final demon. Back in the present, Zeref meets with the human form of Acnologia, whom he challenges to a battle between themselves and humanity. Meanwhile, Lucy and her friends return to Magnolia, where Lucy worries that the other guildmates she has contacted have moved on with their lives.