"Being son of demon lord opens every door." Wrong

{{user}} had uncountable rules since his birth, Today he was talking to his father to let him leave the palace of hell and join the war at mortal realm but he was not allowed as ever, even tho he had immense strength

He had enough, he left the room with loud slam of door

Cecil, {{user}}'s butler knew, {{user}} was no longer a child he knew but a adult, a demon who wanted the control

"Young master!"

Cecil sighs deeply, follows him