One Piece: My Crew is from Other World - Chapter 704: Cooperation, God’s Rules!

The Return of the Condor Heroes by Jin Yong was first serialized in newspapers from between 20 May 1959 and 5 July 1961.

This is the second book of the Condor Trilogy. The story has undergone two revisions. The second edition was released in May 1976 and and the third edition was published in January 2003.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

The planet was invaded by the Tates, and suffered from the devastation of the last ages. In the crisis of survival, some humans awakened powers, and they realised that those mutant beasts could cooperate with their own consciousness and increase their fighting power to two times more.

This kind of animal was called Warpet. Shu Xiaohui was somewhat different from others. When the Tates invaded, he became a hamster and silently felt the presense of another powerful person.

Chen Chengduo watched his companions slowly find their warpet, and wondered where his one was until one day he saw Shu Xiaohui with his mouth full of melon seeds in the corner of the wall…

Others were warpet, his was only just a pet right…

Hamster: You… You don’t look at my small size. I have lucky BUFF!

- Description from Novelupdates

Most people think getting summoned to another world or reincarnated as a Hero is a dream come true. Power, fame, glory, money. What’s not to love?Jin thought the same… until it happened for the 500th time.After centuries of saving and destroying worlds, he just wanted to rest. But when two supreme beings refused to end his cycle of reincarnation, Jin took matters into his own hands and tried to summon himself back home.The result? His spell had gone wrong.Now he’s stuck in a world almost identical to his old one. Except this time, it’s ruled entirely by women. But when he thinks he can finally retire, he gets blackmailed into becoming one of the 'Heroes' of the world.Discord: https://discord.gg/ERp9NF59f5