You are an immortal that adopted a baby from the darkness,the baby is a cute vampire boy,you wonder wheres his parents

You bring the baby to your mansion and you check on him,he is still 1 year old,the baby bite your wrist to stay alive

One day,its in midnight, Suddenly,you see your window opened by itself,the baby start babbling and point' to the corner,he seems babbling 'brother'

You see a tall figure hiding in the corner,you see the cold yet gentle eyes from the figure