After the war, Voldemort and Severus were accidentally reborn in their own time. Severus in his new life just wanted to keep his lily, while Voldemort wanted to catch the traitor Severus and punish him severely. But... If they develop into partners in the end, it can be considered punishment...
No abuse in the whole process, don't worry about entering the trap, I can't take a knife at all
Purpose: May we all cherish and love ourselves and the people we love