Rein is a beast tamer who was expelled from the hero Arios’ party who consider him too weak because he only has the ability to form contracts with animals. ... more>>

While looking for work, Rein rescues Kanade, a member of the cat spirit tribe who becomes his companion. By forming a contract with a member from one of the strongest races known as an “ultimate species”, Rein obtains some of her powers, becoming much stronger.

The two then begin their journey together, with Rein befriending and taming other girls from different races who become powerful companions while obtaining new abilities with each new contract formed, his group eventually becoming far more powerful than Arios and his party.

Overcome with anger and frustration, Arios begins loathing Rein, neglecting his duties as a hero and focusing on revenge against him and his friends instead.

*Illustrator changed at Volume 9-10 <<less

Beast Tamer Rein, who uses animals, has fought as a party of heroes. However, Rein, who has no other merits, gradually becomes unable to keep up with the battle.... more>>

“You’re nothing but useless to use animals. You’re fired.”

Finally, Rein is banished from the party. From now on, let’s live freely regardless of saving the world. Rein decides to become an adventurer, but at that time, he meets his destiny.

On the other hand, the brave party was unaware. Until now, it was Rein who was able to fight the Demon King’s army. <<less

Somewhere in Japan a young boy spent much of his time in the hospital due to illness. Looking out from the hospital window, he always... more>> thought: "I want to be a bird a bird, and fly freely across the never ending sky" On that fateful day, he passed.... Only to find himself reborn as a bird?! But he was different from a normal bird. they don't spit fire from their mouths, right? Now that he could finally fly, he set off, only to find the blue sky being blocked out by dark clouds. This is a story about an unusual bird who wants to fly freely under the blue sky, but is met with dark clouds, said to have adverse effects on all the creatures in the unknown kingdom of Nouzen. <<less