Naofumi Iwatani is one of the four heroes summoned with three others through an ancient ritual. It was a legendary ritual to summon the leg...

Naofumi Iwatani is one of the four heroes summoned with three others through an ancient ritual. It was a legendary ritual to summon the legendary Four Saints. Is it another story of a hero who saved the world?
While on Earth Naofumi Iwatan was a sophomore as well as a typical otaku. You don't need to work part-time job because your parents are well supported. Therefore, Naofumi can freely pursue his passion.
It all happened when he was reading a light novel in the library. A strange light emanated from the book and dragged him to another world. All four were summoned and now they carry the burden of saving the new world.
Each of them corresponds to a particular weapon and has a total of 4 items: sword, spear, bow and shield.
The protagonist Naofumi is the Shield of the Knight who uses the legendary shield. Different from the other three, while they started to advocate for stance and compensation (briefly understood as making prices and asking wages). Naofumi wanted to accept the current situation even though he felt that his shield was more of a supporter than a weapon.

Naofumi Iwatani
The world they were summoned to had a prophecy about the end of the world with waves of invading monsters. Their goal is to lead the presence to the world.
Countries have a device that can detect the location of a wave. Of course, the mission of the four summoned heroes is to prevent it from destroying the world. Bringing in his eagerness to feel like he was the hero of the light novels he had read. Naofumi will begin his own journey.
Naofumi kept her enthusiasm and positivity until Princess Mein Sophia betrayed her and stole his initial pension.
It turned out she was just a spy from the Knights of Merchants sent. The target is none other than Naofumi's money. Not only that, he also carries the crime of defaming the princess. The Shield of the Knights had been estranged by everyone ever since.

Mein Sophia, princess of Melromarc
Naofumi no more penniless is still a sinner. Everything was completely different from his original imagination. But what makes Naofumi hurt is being betrayed by his only ally. It was someone he completely trusted. It turns out that Naofumi was just a pawn for them to use and after reaching their goal, they were willing to ruin him.
Since then, Naofumi Iwatani's personality gradually changed, becoming closed, cold and hate the world. He had lost faith in the people who lived in this world. Even the three of them shared the same world before. Naofumi tells himself that he won't trust anyone anymore unless they have a slave contract with him.
His hatred not only for Mein Sophia but inadvertently became a gloom to women. He became hateful and evaded women. Naofumi would be disgusting if they felt like Mein Sophia.

Raphtalia and Filo helped Naofumi overcome the ghosts of the past
Everything would probably last forever without the appearance of Raphtalia and Filo. These two people pulled him out of that mud of hateful mud. At the same time, make Naofumi once again find faith in life. From there, we have a cold, intelligent Knight Shield and always become a solid shield for his teammates.
Ms. Phoenix