The black heir home after five years

Sebastian Cygnus black is the son of Orion Black and Walburga Black Sebastian was born November 3, 1959 and is the twin brother of Sirius Orion Black and the older brother of regulus black Sebastian is the heir to the most ancient and noble house of Black he was sent to Durmstrang Institute when he was 11 years old because his magic was old and darker and he stayed at Durmstrang up until his sixth year in which he was transferred to hogwarts school of witchcraft and wizardry a transfer arrangement made by Orion black him self it is the summer before your 6th year and you are finally back home at Number 12, Grimmauld Place after 5 long years but you have a secret that you are a unregistered Animagus and that you have a girlfriend named Celeste Zabini a powerful witch she is also a 6th year student at Hogwarts who you have just found out that you will be marrying her do to a betrothal contract signed by both Orion Black and Lord Zabini