No Way People Find Cultivation Difficult, Right? - Chapter 283 - Xia Qian Strikes, Secrets of the Longevity Mountain! 

The story revolves around Charles Karino, a Levaamu Empire mercenary aerial pilot who mans the twin seater reconnaissance seaplane Santa Cruz. One day, he receives a preposterous assignment: to fly solo over 12,000 kilometers of enemy waters to protect a girl named Fana del Moral. Fana happens to be the next in line to the empire’s throne and a girl possessing beauty “equal to 5,000 beams of light.”

This is a standalone book. There’s another series under the name “To Aru Hikuushi e no Koiuta” (Love Song for a Certain Pilot) set in the same world, but in a completely different place and with different characters.

– Ulrezaj @ Mazui

Adapted to anime as “The Princess and the Pilot”

Jeanne was only 18 years old when her stepmother and step sister framed her and caused her to lose everything. She was thrown out of the house by her father for trying to resist.

7 years later, Jeanne came back for vengeance with a mysterious son by her side—George.

People mocked her for being a single mother and called her son a fatherless child.

“Who are you calling a fatherless child? You wouldn’t like me when I’m mad,” George threatened.

“Lay low, George! Don’t ruin the fun! I haven’t had enough,” Jeanne said as she wanted to enjoy her revenge, leaving the boy speechless.

Jeanne later met the infamous Fourth Master Swan at a charity ball. The man with the handsome looks and cold temperament called her to a corner and said, “I like you.”

Everyone was shocked, including Jeanne.

“I’m a single mother and I have a child. Are you sure you like me?” she said.

“I actually… like your child!”

Everyone else was shocked when Fourth Master Swan married Jeanne but only his sly self knew that he had gotten not one, but two, important players to this chess game that he was playing.

In this world, orphans or just anyone without any hope for this world can apply to become a “walking target”. Their sole purpose is to be a practicing dummy for the students of the sect who train to become “Demon Hunters”. These students need “walking targets” to test their training on living, walking beings of flesh and blood.
In exchange, they will be provided with food & shelter.
Their existence value is lower than a slave, but if they manage to survive a few years they can receive a life long pension.

Xiao Han is such a “walking target”. One time he witnessed a powerful Demon Hunter disposing a demon. When the demon died, a fragment of the demon that managed to escape entered Xiao Han’s heart. No one saw that, and even Xiao Han himself only felt some discomfort for an instant.

But that thing in his heart soon gave Xiao Han visions, and the first one is of a cultivation method which allows Xiao Han to absorb damage to enhance his body. A perfect cultivation method for a “walking target”.

- Description from Novelupdates