Toaru Majutsu no Index - Volume 19, Chapter 4: Two Monsters Inviting You to Hell. Dragon(≠Angel).

What is it like to own an abandoned oil town in the West? At first, Xu Xing simply wanted to provide some convenience for travel enthusiasts and camping enthusiasts traveling by car to the northwest.

However, it has been out of control since then…

The stall has been upgraded to a convenience store with a unique style, the instant noodles cooked in an earthen pot have been transformed into a restaurant that provides hot and authentic beef noodles, and the shack has been transformed into a hotel that is unique in the country and can look up at the deep starry sky. The tire point has been upgraded to become a gas station and maintenance station….

after that,

The town unknowingly became the size of a small county town…sixth tier, fifth tier, fourth tier, third tier…a few years later it became the only new first-tier city in the northwest Gobi Desert…

- Description from novelbuddy

The servant looked at the grieving princess. “Your Highness, the Regent Prince sent your scholar fiancé to the Western Butcher’s daughter!” 

The princess gritted her teeth, speaking to her servant that it matters not as she has other suitors in line. Many days later, much to her dismay, the servant ran in a hurry. “Your Highness, the Regent Prince expressed his intention of becoming your suitor! All other men in line were sold to Gou Lan Red District!”

The princess was distressed. She said to her servant it matters not. She’ll soon be married to Prince Fuma. Then the uneventful came. The servant once more ran to her, almost tripping in the process. “Your Highness, Prince Fuma was imprisoned at home! Meanwhile, there’s a red sedan chair waiting at your residence for your marriage! It was led by the Regent Prince!

The princess was stunned. For a day such as this to come, it seemed impossible. This nothing but a sad story of a female boss crossing back in time to hold the thick thighs of the big boss. But while raising him, she was eaten in the process.

“Ding! The first function is activated, and automatic training is turned on. The training speed is equal to the super evil!”

“Ding! The function upgrades, the training speed doubles, the function upgrades, the training speed doubles!”

“Ding! The second function is activated, turn on automatic martial arts…” “Ding! The third function is activated…”

Is it difficult to practice? I’m sorry that one day of cultivation is equivalent to decades of cultivation for you!

Is it difficult to practice? Sorry, I can easily learn countless exercises without doing anything!

Alchemy is difficult? I’m sorry that my pill will be moldy if I can’t finish it!

…

After Su Lang passed through, he obtained a one-click training system, which is getting stronger every second! From now on, sling everything, the world has no enemies!

The young lord of a small and weak country saves a dragon beside the sea one day.