Reborn: The Frail Neighbor Is Actually a Top Undercover Agent

[Reborn healing-story forensic heroine + undercover agent returning in poor health as the male lead + redemption + criminal investigation, both leads are faithful, happy ending]

Xu Nian'an has a neighbor who is gravely ill. She has run into him a few times. He always keeps his head bowed, his bangs hiding his eyes. His face is pale and translucent, and he coughs from time to time, as if he might faint at any moment.

He never speaks to her. Xu Nian'an only knows that his name is Qi Yanhan. They are no more than the most ordinary strangers.

Until

When Xu Nian'an dies in the line of duty and her spirit leaves her body,

she sees Qi Yanhan rush over like a shot and cradle her blood-soaked body, weeping in utter anguish.

For six months, her spirit follows him as he clears her name, ventures alone through the darkness, and personally kills every one of her enemies.

On the day the last enemy is brought to justice, he visits her grave again and gently strokes the photograph on her headstone. “Without you in this world, what joy can there be in living? An'an, I miss you so much.”

The snow falls for seven days. He leans against her headstone and never gets up again.

A flood of white light sweeps over her, and Xu Nian'an is reborn. She returns to age twenty-two, two years before her death. The tragedy has yet to happen, and Qi Yanhan is still alive, still the frail, reclusive, mysterious neighbor next door.

On her first night back, she clearly hears a deeply repressed groan of pain through the thin wall between their apartments. Those faint sounds, which she never noticed in her previous life, pierce her heart now, one after another.

Only then does she realize she never knew what ailed him. But she knows that in this life, she will not let him stand alone in the darkness, humbly enduring everything in silence. She will heal him and bring him warmth.

Without hesitation, she knocks on the door across the hall...