The Lover Who Came Back from the Dead

Nanyu was injured in a car accident and lost his memory. But my boyfriend of three years has never left me, always staying by my side. Nanyu was deeply moved by her boyfriend's thoughtfulness and dedication. Until one day when her boyfriend went out for something, Nanyu was alone at home. He opened the attic, which no one had been to for a long time, and unexpectedly found a death certificate inside. Not only that, but the boyfriend's name is clearly printed on it. The boyfriend is dead. Who is the man outside the door? Intention:.