Itai no wa Iya nanode Bōgyo-Ryoku ni Kyokufuri Shitai to Omoimasu - Chapter 24

Orphaned at a young age , Layla Llewellyn feels like the luckiest girl in the world after she moves in with her uncle Bill , a gardener who lives on the scenic Arvis estate in the Berg Empire . To Layla Arvis seems like paradise ; she loves to explore the vast forest , always bringing her notebook to record the wildlife she encounters . She especially loves the birds , watching them with awe as they hatch and grow from fluffy chicks into beautiful birds . Duke Herhardt , the young , handsome lord of Arvis , is also interested in birds--- and Layla . But the difference is , he's interested in birds because he likes to hunt them.... and he's interested in Layla because he likes to make her cry . If a lovely bird is trapped in a golden cage , which will she choose : a life of luxury , or freedom ?

Luo Ling, an expert in the art of disguise, was bound to a System and was eager to begin his task.

As a result, before even successfully completing a mission, he got married!

At a 36 degree angle, Luo Ling sorrowfully looked up into space: “Tong’er, tell me, do I still have a chance to free myself?”

System: “… Your man is behind you.”

Luo Ling: “!!!”

The person who arrived, gathered Luo Ling in his arms, hugging him from behind as he said in a bewitchingly dangerous tone: “Based on your thoughts, it seems that I have not given you enough love. So let’s proceed in exploring ways to continue a new life.”

- Description from Novelupdates

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

- Description from Novelupdates

I was a 28-year-old researcher in Japan, and before I knew it, I have been reincarnated in a fantasy world.

Furthermore, I had a half-spirit father and a spirit mother.

An aunt who is deeply attached to father, cousins who are problem children. Girls who cause awkward situations as in an otome.

Furthermore, in order to gain the affection of a love interest, a cousin even had a word battle with a king!

I am very busy helping humans as well as spirits!

And when I find people who are targeting my father,

「I’ll crush you.」

The cheat protagonist deters those who aim at her family. This is such a story.