Blood legacy (слэш)

Tommy Whitaker is a paramedic who trusts only blood, breath, and the human body until a routine call tears him out of reality and into 1990 with a man that says his name is Harry Potter.
Harry is controlled, dangerous, and covered in blood that isn’t his. He claims they are no longer in their world and that Tommy’s arrival is now a fracture in time. Tommy is forced to accept the impossible magic is real, and he is stranded in a version of history that should not exist.
He meets a younger Harry an abused child in a children’s home where survival means obedience. Tommy responds instinctively, offering care and stability but the older Harry’s reaction becomes something darker obsession and control.
They need help from Severus Snape cold and intelligent, both men become fixated on Tommy in different ways: possessive, territorial, consuming.
Tommy becomes the centre of competing claims of control, protection, and desire.
Then the truth emerges: Tommy is a vessel for Lord Voldemort, making him both valuable and dangerous in a war he never knew existed. Rivalries form, alliances fracture, survival becomes possession.
Harry, Severus, and Tommy are locked in a volatile triad of obsession and dependency.