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

“Jin… Your journey ends here.”... more>>

So declared his childhood friend and the “Hero”, Reki.

Feeling like he was becoming a burden, Jin decided to accept her advice. He bid farewell to his other companions, the “Saint” Yuuri and the “Sage” Lucika, and returned to his hometown. He had intended to spend a peaceful time there, but…

“Nice to meet you, mother-in-law, father-in-law. I’m Lucika. I’ll be striving for a happy future with your son, so I hope for your continuous support for many years to come.”

“Hmmm?”

However, Lucika’s sudden marriage announcement was just the beginning.

“I’m Yuuri, Jin’s future wife. He made a passionate proposal to me in the past.”

“I have already been chosen to be Jin’s wife since ten years ago… We made a promise.”

For some reason, Yuuri and Reki, who were supposed to be heading to defeat the Demon Lord, appeared at Jin’s house. Thus began the completely unexpected daily life of Jin, along with his three potential brides. <<less

"Fine, I'll Marry Everyone and Start My Harem Life!"... more>>

"Jin... our journey ends here."

Jin, who had been adventuring with his childhood friend and Hero, Leki, in a party to defeat the Demon King, is suddenly told they're parting ways—right before the final showdown. Heartbroken, Jin returns to his hometown. But soon after, his former party members, who swiftly defeated the Demon King without him, start proposing to him one after another!

"Jin, do you remember the promise we made when we were kids?"

"You said you'd take me as your bride, didn't you?"

"Jin, what do you think we should name our baby?"

Unknowingly, Jin had promised marriage to all three of them! Now, he's on the path to building a polygamous harem.

"W-Wait, everyone, calm down!" <<less