Bringing The Farm To Live In Another World by Ming Yu - Chapter 2007: Flowers Bloom

Despite having found Mingxi, the Zhao family continued to favor the fake daughter, saying that Mingxi was not as kind nor as graceful as Zhao Yuan.

Mingxi didn’t mind. She continued to work hard to please her family although they would always say that she was trying to rob their attention away from Zhao Yuan.

Until she died because of a terminal illness.

It was then that she realized that Zhao Yuan was the actual lady blessed by luck while she was merely this novel’s evil supporting character with a tragic ending.

Zhao Mingxi who was given a second chance at life was bitterly disappointed. She no longer cared about her family. Screw her family and her fiancé. She immediately packed her bags and left home, off to complete the task given by the system named ‘Becoming Friends With Fashionable and Valuable Characters’.

After she left, the house suddenly became cold and quiet.

By right they should feel at ease, but–

Her parents, her indifferent elder brother, her brash younger brother, Chen Liyao who was used to her pursuits were all successively feeling… unused to it?

She, a renowned assassin of the 21st century, actually crossed over to become Su Manor’s most useless good-for-nothing Fourth Miss.

Six months ago, tens of thousands of black phantom towers appeared all over the world, floating above the cities. Chemists, physicists, religious people… all of them could do nothing.

Six months later, people became used to the towers and no longer paid them attention.

One day, Tang Mo saw a flying insect crash into it instead of going through it. The next day, a sharp and clear child-like voice issued an announcement to all humans.

“Ding dong! November 15th, 2017. The earth is online.”

The black tower’s three iron-clad rules:

1. Everything is explained by the black tower.

2. 6 o’clock to 18 o’clock is the game time.

3. All players, please strive to attack the tower.

- Description from Novelupdates

Accidentally, she got pregnant.