MTL - Demons Beside You (The Demons Beside Me) - ~ Deceiver

When she was eighteen, she was forced to take her sister's place and married him, who was disabled in both legs and impotent therefore.Despite all this, she has accompanied him through the darkest period of his life.However, two years of marriage and companionship still couldn't compare to the return of her sister.In order to treat her sister's illness, he even cruelly forced her onto the operating table, disregarding her pregnancy.His cold-bloodedness and ruthlessness left her heartbroken. After leaving the weak and sickly second child with him, she disappeared with the other two children.It wasn't until he completely lost her that he realized he had already fallen deeply in love with her.......Five years later, she returned with mini versions of their child.Looking at the adorable child who seemed like a spitting image of his son, his face turned pale.“Why do you look exactly the same?”The little one replied, “Biologically, only identical twins look exactly the same.”“?...”Did she give birth to twins?He angrily cornered her against the wall and asked, “So, you had twins back then?”She chuckled awkwardly, “If I say it was triplets, would you kill me?”

Suzuki, an adult programmer, suddenly notices that he’s been thrown into a different world while wearing a casual clothes at level 1. He gained high levels and treasures after using the 3 times use-disposable-magic, Meteor Shower, once. After that he intends to do different world “sightseeing tours”? He meets 3 beast girls, beautiful purple and black haired sisters, and an eccentric blonde haired elf girl along with various people during his trip. Although there are occasional fighting with demons and demon lords, this is a heartwarming fantasy story at heart.

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

To treat her sick brother, she was forced to marry him in place of her cousin, who was disfigured and paralyzed. At first, their relationship was purely transactional, with neither caring much for the other. But after going through a lot together, they fell in love with each other. He doted on her deeply.She was considered an ordinary person by the world, but it was later discovered that she had multiple identities - a mysterious underground boxing champion, a highly-skilled doctor, and a mysterious and renowned composer... He also realized that their fates had been intertwined long before they met.