Akuyaku Reijou ni Nanka Narimasen. Watashi wa『Futsuu』no Koushaku Reijou desu! - Chapter 168.2: Knights Order and his resolve.

To save the masses, Zhong Nianyao sacrifices herself to the heavens, thinking she would vanish into thin air. Surprisingly, when she opens her eyes again, she finds herself as the youngest daughter of the Zhong family in the imperial capital. In her previous life, as the national advisor of the Li Country, she spent her days in deep contemplation and eventually sacrificed herself for the people. Given a chance to relive her life, she decides to live freely and with ease. Zhong Nianyao, known in the capital as the infamous useless heiress who excels only in spending money, has been famously infatuated with the eldest young master of the Li family, Li Jingming. She even jumped into a river just on his saying. Later, to everyone's astonishment, Zhong Nianyao changed; she stopped chasing after Li Jingming and started setting up a stall on the overpass. People then said she must have gone mad. However, as time goes by—A real estate tycoon holds a black card, pleading for her to tell his fortune.A famous movie star clings desperately to her, crying for help.Even a renowned old artist brings his works to her, asking for feng shui advice.Zhong Nianyao didn't expect that just returning to her old profession would turn her into a master. She had always intended to keep a low profile! As she ponders this mystery, a man with a devilishly handsome face suddenly hugs her from behind, his deep voice filled with a seductive charm, 'My lady, when shall we start planning for a child?' Zhong Nianyao glances at the man and retorts with a single word— 'Scram—'(Sickly possessive lord VS Cunning heiress, pure love, those who like it, dive in!!)

An alien race invaded the Earth on June 6, 2128. At the midst of this war, many nations allied with the alien threat and the war nearly wiped out the rebelling humans of the planet. At the edge of mankind's survival, the United Nations Army launched its forces to eliminate the immediate stellar threats that loomed over Earth.

General Seeker Carlean, commander and leader of the mission, risked and gave his life to destroy the immediate stellar threat. The battle was won though Earth lay in ruins. Perhaps mankind will live to see a few years of peace before the alien threat returns to wipe out their existence.

At the immediate aftermath of the stellar battle, the fallen Seeker Carlean awakens and finds himself at aged 17, living the peaceful life he lived 16 years before he died.

So begins a new game in the battle for humanity's survival.

Hell Ghost Wang Wannian is born again, smiling and proud!
What?
Are you a soldier, will the tank drift?
You are a master, can you give birth to dragons and tigers?
You are a superman, can you call the wind thunder?
Excuse me, I am not targeting anyone, everyone in my eyes, it is rubbish!

- Description from Uukanshu (translated)

She is intelligent, beautiful, calm, and professional. As the youngest chief forensic investigator for the past few years, her future was very bright. All of this, however, changed with a bizarre time-travel.