It Runs In The Family - TG Story (Patreon)

When a boy born into a family of witches shows signs of being able to cast spells himself, his once distant mother suddenly takes a special interest in him, introducing him to the world of magic and teaching him a variety of spells, keeping him oblivious to the fact that every time he casts a spell or uses mana, he gradually begins to transform into a full fledged witch...