Kuro no Maou - Chapter 451

Arthur is an Atelier who works under pressure. When the curse of the Succubus activates his Netori System, Arthur is unable to resist his desire to win a woman's loyalty. There is no other reason for him to test a woman's loyalty that is easily shaken when his Netori System is activated.

Lu Zhengfei personally killed Chen Qianqing with his abuse.

He cut off Chen Qianqing’s legs, and blinded his eyes, locking him up with chains in his house. Then, he watched with his eyes wide as he died. Injuries inflicted in the name of love would always end in a tragedy.

Did Lu Zhengfei regret it? Of course he did. And so, God gave him a chance to be reborn.

But this time, he found that he himself——became Chen Qianqing.

- Description from Novelupdates

Due to an unexpected turn of events, Xia Fei consumed a Super Gene Optimization Fluid that bore no brand, expiry date, instructions or stated its place of origin.
Our story begins here…

After transmigrating into a fantasy game world, Ye Anping became an unknown cannon fodder with low qualifications who was destined to die tragically at the hands of a villain at the age of fifteen. So, he was a little desperate.

Fortunately, he was only four years old now, and there was an cannon fodder younger sister with excellent aptitude by his side.

Ten years later, the junior sister had grown up, becoming not only beautiful but also stronger. She caught the attention of the protagonist.

And then Ye Anping became fed up with the whole situation.

Ye Anping: “Junior sister, I am your senior brother, stay away from me!”

Junior sister: “Protagonist, I’m just an ordinary person, stay away from me!”

Protagonist : ” I am wholeheartedly devoted to you Lady…”