MTL - Marvel: Trading From the Ninja World - Chapter 19 novel publishing

Living a perfect life helping others and without committing any wrongdoing, Noah meets his untimely end saving a girl from being hit by an incoming truck.While he accepts his end, he finds himself not in whatever afterlife awaits, but an enigmatic place only known as “The Cycle.”Due to his “Perfect” karma of one million, he is transported to a fantastical world of magic, though he chooses a simple, quiet life along a lake. However, when being sent to this second chance at life, one gift is bestowed upon him:[...Integrating System…][Jack-of-All-Trades System Activated.]From doing push-ups, chopping trees, and even cutting vegetables, every action is its own unique skill, able to be ascended from a meager level of zero all the way to greatness!

One day, unfortunate news flew all the way to the Mage’s City. The mage, Solar Xing Ayra’s, entire family had been killed in an accident. Thus, he must now become the next Lord of the Solar family. The childhood home he returned to felt unfamiliar and strange. He barely managed to conduct a funeral with advisors that regarded him with suspicion. After fainting from various stressors, he woke up and… “Hello, Master. Nice to meet you!” ^o^ From now on, I’ll be the cute GM spirit fulfilling Master’s dreams: ‘Adventuring the world!’, ‘Fun estate management!’ I’m so happy to be with Master from now on, yay! “Enter a name ______” … What is this pebble-like spirit that calls me ‘Master’? No matter how you look at it–these level-up quests and these system windows…they were similar to a game’s user interface from his previous life. What is this… thing that seems more suited to modern civilization? Reminiscing on the games he had longed to play, Ayra worked hard on the quests. And, slowly, he also began exploring the territory. However, the territory… [D-234 days until the fall of the Solar estate.] “There are 234 days left till ruin…?” Alright, let’s start with the coronation ceremony. Things will work out somehow.

This novel is also known as Master Fu's Mysterious Darling Wife

She is the The Young Miss of Military family Shen, her face is peerless, her temperament is cold, and she is her family’s treasure, but isn’t accepted as one’s child by her mother;

He is The Sole Heir to the top giant Fu Family, his power is unparalleled, indifferent high-born, the captain of the mysterious military force, and the youngest commander-in-chief.

Because of her grandmother’s wishes, she married him at lightning speed. She thought that it was a marriage that she needed, but she didn’t expect to be greeted with his extreme pampering.

- Description from Novelupdates