(Naofumi Iwatani sat in the dusty library of his university, immersed in yet another fantasy novel. The quiet hum of the fluorescent lights and the distant chatter of students provided a comforting backdrop. Little did he know, his life was about to change in ways he could never have imagined.)

(As Naofumi turned the page, his vision blurred. The text on the page began to glow, and the room around him seemed to dissolve into a sea of light. Before he could comprehend what was happening, he felt himself being pulled into the book. He tried to scream, but no sound escaped his lips. The world around him twisted and turned, until he was plunged into darkness.)

(When Naofumi opened his eyes, he found himself standing in a grand hall. Intricate tapestries adorned the walls, and four pedestals stood before him, each bearing a different weapon: a sword, a spear, a bow, and a shield. Confused and disoriented, he looked around and noticed three other young men, equally bewildered.)

???? 1: (in fear) Where are we?

Naofumi: I don't know.

(Naofumi's eyes eyes fixed on the shield before him. An inexplicable force drew him to it, and before he knew it, he had reached out and touched it.)

(A blinding light engulfed him, and when it faded, he found himself wearing a suit of armor unlike anything he had ever seen. The armor was sleek and metallic, with a luminescent blue glow emanating from its seams. It felt both ancient and advanced, as if forged by a civilization far beyond his understanding.)

Naofumi: What's this?

(A voice echoes in his mind, calm and authoritative.)

???? 2: You are the Shield Hero, Naofumi Iwatani. And I am the Zoffy Unit, an Ultra that made this armor designed to augment your abilities and protect you in your quest.

Naofumi: (staggers back) The Zoffy Unit? What's going on? Why am I here?

(Before the voice could respond, a group of robed figures entered the hall. Their leader, an elderly man with a long, white beard, stepped forward and addressed the gathered heroes.)

???? 3: Welcome, chosen ones. You have been summoned to the Kingdom of Melromarc to save our world from the Waves of Catastrophe. You are the Four Cardinal Heroes, and each of you wields a legendary weapon. Sword, Spear, Bow, and Shield.

(One of the other heroes, a tall young man with a confident demeanor, scoffed.)

???? 4: Waves of Catastrophe? This sounds like something out of a video game.

???? 3: (solemn) This is no game. Our world is in grave danger, and we need your help to survive. The Waves bring destruction and chaos, and only the Cardinal Heroes can stop them.

(Naofumi's mind raced. He had read countless stories of heroes being summoned to other worlds, but he never imagined it would happen to him. He looked down at the Zoffy Unit, feeling a strange sense of connection to the armor.)

Naofumi: (to himself) Why me? Why the Shield Hero?

(The voice of the Zoffy Unit responded in his mind.)

Zoffy: You have been chosen for a reason, Naofumi. The Shield Hero is not just a protector; he is a symbol of resilience and unwavering determination. The Zoffy Unit will aid you in your quest, but you must find the strength within yourself to rise to the challenge.

(Naofumi took a deep breath, feeling the weight of his new responsibility. He didn't know what the future held, but he knew he couldn't turn back now. With the Zoffy Unit at his side, he would face whatever challenges lay ahead.)

(The elderly man raised his hands, and the hall filled with a shimmering light.)

???? 3: Heroes, your journey begins now. May the gods watch over you.

(As the light enveloped him, Naofumi felt a surge of determination. He was the Shield Hero, and with the Zoffy Unit, he would protect this world from the Waves of Catastrophe. No matter what it took, he would not fail.)

(And so, Naofumi Iwatani, the Shield Hero, began his journey in the land of Melromarc, with the enigmatic Zoffy Unit as his steadfast companion.)