Magika no Kenshi to Shoukan Maou - 4.4.1 — Cooperation Attack

A supreme expert in the Immortal World had died, and a strand of his soul returned to its original body on Earth. Tang Xiu discovered with amazement that ten thousand years passed in the Immortal World, yet only a single year passed on Earth.

Ruthlessly betrayed by his lover and trusted friends, Tang Xiu found that his soul went back to his previous body on Earth, and, despite he spent 10,000 years in the Immortal World, just a year has passed on Earth and many things have changed. Having an unsurpassed knowledge, Tang Xiu will protect his loved ones and go back to the Immortal World to take his revenge.

- Description from Novelupdates

15 years ago the world discovered magic as well as mythical beings (basically beings from various legends) in another dimension. Humankind learned to summon these dangerous mythical beings and use their power to great effect. Seven countries formed contracts with these “mythical beings” and gained their allegiance as a result. The mythical beings will choose their summoners on their 14th birthday and give them a stigma. Schools have been set up to train summoners and magical swordsman (basically bodyguards that give the summoners time to cast their spell) as a result.

15 years later after the finding of magic Kazuki Hayashizaki is chosen as a summoner and given a stigma to indicate that. This is surprising since males aren’t chosen as summoners due to their low amount of mana compared to females. As the first male to be a summoner Kazuki is under a lot of scrutiny by almost everyone.

To complicate matters his sister (who’s a magical swordsman) is against him going into summoner school to train there as a summoner. Because summoners and magical swordsman have a cat mouse thing going on where summoners look down on magical swordsman as inferior so his sister naturally is against him going there. She’ll stop him even if it means going to war.

Kazuki however is determined to thrive in summoner school and has already determined to give it his all. Even if he’s the lowest ranked student (ranked E) and his fellow students intend to demean him he’ll prove himself as the strongest summoner.

Here is a story about an ordinary hard worker struggling hard in the troubled times of the Three Kingdoms and working hard to farm.

- Description from novelbuddy

In the realm of Nexaria, where elemental spirits and divine beings shape the fate of the world as a land of mortals striving to become gods against the demons of the Abyssal universe, a young boy named Lassim Vanthar embarks on an extraordinary journey of advancement, adventure and becoming a bastion for those around him in their fight against the Dragal.Born into a noble family with a legacy of Fire elemental martial prowess, Lassim possesses an unparalleled gift on his 8th birthday—a connection to two differing elemental spirits, a feat unheard of in the history of his world. A gift and a tampering of the order until now that is an omen. It is a sign of the Gods influencing the future fate of Nexaria on a more serious level.Lassim must harness the power of his dual spirits to protect his loved ones and confront the looming threat of the Abyss' encroachment on his universe, but one step at a time as he grows from just a tool of the God's to a major power as the hero ofnot only Nexaria, but the entire universe.Lassim faces daunting challenges, battles fierce adversaries, and unlocks the mysteries of his own destiny that has been tampered with by the Gods of this universe. How will he react and adapt to his situations?