Marriage contract: Genius baby's belly daddy - Chapter 6

A master assassin transmigrates into an interstellar era.

When encountering demons, a young man with two horns on his head, red hair reaching his waist, and an extremely handsome appearance leads the demons to the front.

Youdou: Actually, I really don’t want to be a master of monsters. This profession is completely useless. My ideal is to become a magic stick…, bah, it’s to become a great onmyoji.

All the monsters: My lord, wake up, you are the leader of the monsters yourself!

- Description from novelbuddy

After being flogged to death for a crime she didn’t commit, Calista received a second chance when a system contracted her. It was simple: complete tasks and she could earn a second chance in life. After completing several of them, the chance to reincarnate in her original world and body was finally granted to her.However, unlike others, she didn’t want revenge against the people who killed her or wanted to unmask what truly transpired back then. All she wanted was to live peacefully and enjoy the bounty benefits which came with the reincarnation.And that was something she found when she met a man she fell in love with in some backward village. Unfortunately, all that was broken when her husband of five years perished at the hands of bandits.Things went downhill when Calista married her second husband, Orson, an amnesiac man whom she scammed into marrying her. But things weren't as simple as they seemed— Orson might be hiding some secrets of his own.Led on a path of revenge that Calista never thought she would be on, she soon realized that Orson might have more to do with her first life and death than he led on. If he knew she was still alive, he might kill her again.That meant that this time, Calista might have to strike first.

Changqing has always felt that she’s incomparable to Guan Ying in every aspect. Even though she is pretty and has a good family background, this world is nothing more than a world where Princes are more attracted to Cinderellas.

Her first love that she dearly remembers in her heart for years eventually becomes Guan Ying’s current boyfriend and her fiancé is Guan Ying’s ex. He has yet to forget Guan Ying.

A business marriage brings Changqing and Song Chuyi together despite the absence of love.
In public, he is her friend’s ex and in private he is her husband who cannot be publicly–known.
At the hospital, her good friend enjoys her husband’s embrace while she can only act as though he’s a stranger.
At a gala dinner, her good friend hooks her arm around her first love’s arm shyly and she can only smile and give them her blessings.

…

In this marriage, Changqing thinks that all is well other than the fact that Song Chuyi doesn’t love her.
First, her husband is a doctor and he can treat all her illnesses while saving up on medical expenses.
Second, doctors love cleanliness and her husband would always ensure the cleanliness of the house.
Third, at the end of every month, her thin wallet would grow thick with cash that her husband stuffs in secretly.
Fourth, as a person who doesn’t like to exercise, she always get dragged around by her husband day and night to do some pleasurable exercise that is beneficial for the body and mind.
Fifth, she would never have to worry that she would be out of money.
There are always so many uncountable advantages that Changqing enjoys.

…

After the marriage, on a certain night, Changqing looks at Dr. Song gloomily. “Hubby, why are you so nice to me when you don’t even love me?”
Dr. Song continues reading his medical books and ignores her. It’s sometimes quite a headache when your wife is too stupid and daft.
Until one day, Changqing realises that there’s really no free lunch in this world…

- Description from Novelupdates