Dear Mr. Shi - Chapter 6. Retreat to Advance, Constant Breakthroughs

“Ding, the wind and thunder war eagle has been upgraded, the bloodline is activated, and the dark flame phoenix has evolved!”

“Ding, the Xuanwu level has been completed simultaneously, the current level, the immortal level!”

The aura recovered, beasts ran rampant, and humans lost half of their population in an instant.

The demise of human beings is imminent, and the beastmaster turns out, and human beings have the opportunity to continue to survive.

Today, this is a world of beastmasters for all people.

Su Bai came through and awakened his dual contract talent, and he could have twice as many pets as others!

Based on blood and sweat and passion, Su Bai has become an eternal legend in this world!

- Description from novelbuddy

This story is centered around the man named Yi Ji-Hyuk, who has spent 1000 years in a Medieval Western fantasy-like world before returning back to the modern-day Earth. When he returns, he finds that his home is facing monster threats, and that humans with superpowers have appeared to protect the innocent people of Earth.

Leon transmigrated and became a lab rat for Hydra. But he ended up awakening the sign-in system.[Ding, sign-in reward: Glint-Glint Fruit(Pika Pika no Mi).]He starts by destroying the Hydra Base.He accumulated some time and got himself another reward![Ding! Get the sign-in reward: Sun Breathing Technique.]