MTL - A Smile from the Villain - ~ 93, but this world.

A Consort seeks prosperity.A Shepherd cloaked in yellow wages war.A Prosthesis-wielder cries out for retribution.Shadows tremble in the depths, encompassed worlds obscuring the many dangerous secrets of history. Might they be unraveled, all ways of life would be threatened. But to climb higher requires risks, to seek the light requires a Gambit of Lifetimes.Only when one determines themselves capable of risking it all, can all prosper.

Aaron, a wildlife biologist, became a military strategist right after a global war between nations began.He never wanted to participate in the war but he had to, because he wanted to continue his studies on endangered species the moment the war was over, but to his surprise, everyone in his unit were killed, including him, and the next thing he knew, Aaron woke up in the body of a young noble having a similar name to his.However, he also noticed he had awoken in a world different from Earth.In this world, demonic beasts ran rampart with only one thought in mind, causing them to feed on anyone they see, be it humans, elves or even magical beasts as well.During his first encounter with a magical beast, Aaron awakened a system which allowed him to bond with magical beasts and to obtain terrifying abilities from these bloodcurdling magical beasts, so he used his experience as a wildlife biologist to help make it easier for him to bond with these beasts.However, Aaron also noticed he could evolve these beasts if their loyalty towards him had reached a certain level, so he vowed in his heart to grow strong enough to protect those he cared about in this world with the hope of living a happy, peaceful life where he'll be able to focus fully on his passion as a wildlife biologist.

Leiyin accidentally crossed into the One Piece World, and accidentally obtained the Naruto System.

Five years ago, Gu Qiqi’s best friend’s boyfriend cheated on her. She helped arrest someone, but she caught her fiancé. When she left, she was dragged into the room by a mysterious person…

Five years later, Gu Qiqi married Yan Haocheng, who had some problems in city A, with twins whose father was unknown. Everyone felt that Gu Qiqi must have married Yan Haocheng by virtue of his “special ability”.

But she didn’t know that it was Yan Haocheng who didn’t want to marry her. She was afraid that he would die alone, so she gave up and married.

Other people’s impression of Yan Haocheng is: cold, scary, and without desires.

Gu Qiqi’s impression of Yan Haocheng is: shameless, shameless, humanoid teddy.

Others rely on beauty to attract men, but Gu Qiqi only needs to wink at the child to turn her man into a puppy.

- Description from Novelupdates