The Protagonist's Party is Too Diligent - Chapter 425

Song Woo-Moon is the son of a simple inn owner in the countryside.

His body is weak since childhood, and one day, a landscape painting received as a gift from an old Daoist causes his mind to become weak as well.

For years, he is teased as being the village fool, and he grows up as nothing more than a pathetic burden to his parents.

The day he turns twenty, however, his life changes!

Something awakens within him—the supreme martial arts within the landscape painting!

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Yao Tang, the daughter of the Yao family who mistakenly exchanged at birth, was finally found.

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

The story is centred around a cute android who initially had a happy life with her master who dearly loved her. But she was then struck by a series of misfortunes and ended up in a robot-equivalent of concentration camp. Through experiencing and witnessing the sufferings towards herself as well as the people/robots around her, she eventually gained a better appreciation of life.