Black Iron Magician

Tags: Accelerated Growth, Adapted to Manga, Cautious Protagonist, Cruel Characters, Demon Lord, Depictions of Cruelty, Dragons, Elves, Fantasy World, Female Protagonist, Game Elements, Hard-Working Protagonist, Level System, Loli, Magic, Male Protagonist, Marriage, Master-Disciple Relationship, Multiple Protagonists, Revenge, Romantic Subplot, Student-Teacher Relationship, Succubus, Summoned Hero, Sword And Magic, Teamwork, Transported to Another World, Weak to Strong