A certain boy, Fate, had a close childhood friend who promised to marry him. However, due to her parents’ circumstances, she moves far away from him. Fate dreams of seeing her again, and aims to become a strong adventurer to become the man worthy of her. He joins an A-rank party, but he is tricked into signing a s*ave contract. The days are like hell, being overworked every day. Then one day…... more>>

“You are truly useless and incompetent.”

“Then can I have him?”

What appeared was a childhood friend who became a swordsman. When he was saved by her, everything changed for the better. Furthermore, the hidden true power of Fate is revealed… This is a story of childhood friends who join hands and walk together. <<less

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