Magicians Academy

Magician's Academy revolves around Takuto Hasegawa, who attends a magic academy that is not marked on any map. During a summoning spell exam, he accidentally creates a girl named Tanarotte, who happens to hold enough magical power to destroy his country, but fortunately Tanarotte professes undying loyalty to her "creator." The universe separated in three worlds: Heaven, Human World (Earth), Demon realm. The Gods & Demons are not seen fighting among themselves in the human world and try to keep their existence a secret from them. The human world is only source of entertainment and enlightenment to both the demons and the gods to the point of smuggling human goods to both realms Source: Wikipedia