PhoenixAsh

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.

My Beast Evolution System

For a while, Thunder continued to ignore the little fox. Instead, he stood tall and regal.

His glowing antlers continued to circulate the electrical sparks crackling around him as he tried very hard to ignore the little fox playing around his feet. But Glimmer was persistent, and she dashed around the stag in circles, yipping playfully and occasionally poking at Thunder's legs before scampering off.

In the end, the majestic stag couldn't take it anymore. He made a sound that sounded suspiciously like an exasperated sigh, then he lowered his proud head and took a small step forward, trying to see how Glimmer would react.

Of course, Glimmer was excited to see this, and so she barked in excitement and hopped away while wagging her tail, waiting for him to do the same.

Thunder tilted his head, then hopped forward, but this time, he moved with a bit more energy, and Glimmer did the same.

40. Trouble In The Mountain Peaks.