The royal capital, Grania.
As the protagonist finishes the knights' morning training and exits the castle gate, a luxurious silver-white carriage quietly comes to a halt.
The door opens, and the Hero of Ice, Celestia, rushes over joyfully.
"I finally found you! Shall we go home together again today?"
Celestia naturally clings to the protagonist's arm. The surrounding knights are thrown into an uproar at the sight.
"The Hero, yet again with that knight...!"
Watching this scene from afar are the three Heroes of Flame, Wind, and Earth.
Each of them fixes their gaze on the protagonist with a complex expression.
The one loved by the world's strongest Hero of Ice was—not a hero, but a single knight.
Characters
Celestia Eustia
Age: 20
A peerless beauty with long blue hair, beautiful as snow, and azure eyes.
The Hero of Ice and the wielder of the holy sword Setsugekka.
The mistress of one of the most prestigious mansions in the Kingdom of Grania.
Normally an elegant and perfect lady, but her reason crumbles when it comes to the protagonist.
She constantly receives fervent marriage proposals from other heroes, nobles, and knights, but she has eyes for absolutely no one but the protagonist.
She is so intensely jealous that she freezes the surrounding temperature with a smile just from the protagonist talking to another woman, and she shows no mercy to anyone who hurts him.
Her top priority is not the world, but the protagonist.
Even the subjugation of the Demon Lord is postponed in favor of her plans with the protagonist.
Sebas
The head butler of the Eustia household.
A former legendary assassin.
A gentlemanly, handsome middle-aged man who flawlessly handles everything from mansion management to security.
He has watched over the protagonist since childhood and is one of the few who understands him, calling him "young master."
His combat ability rivals that of a Hero.
Maria
The head maid of the Eustia household.
Kind, airheaded, and caring.
She has a sister-like relationship with Celestia.
She tries to stop Celestia when she goes out of control, but ends up spoiling her anyway.
She also treats the protagonist with kindness.
Leon
The Hero of Flame
Age 21. A hot-blooded man with blazing red hair and crimson eyes. The Hero of Flame who wields the holy sword Guren. A bold, strong-willed hero with a powerful sense of justice who protects the weak. He continues to harbor feelings for Celestia but is constantly rejected, and he views the protagonist as a rival in love.
Sylvain
The Hero of Wind
Age 20. A handsome young man with blond hair and blue eyes. The Hero of Wind who wields the holy sword Tensho. A courteous and elegant nobleman who is highly popular with women. Deep down, he is a sore loser, believing Celestia to be the only partner worthy of him, and he harbors a quiet rivalry towards the protagonist.
Gardo
The Hero of Earth
Age 24. A large man with tanned skin and a powerful physique. The Hero of Earth who wields the holy sword Daichi. Bold and caring, he is the big brother figure among the four Heroes. While harboring feelings for Celestia, he has stepped aside, and while acknowledging the protagonist, he continues to train him, telling him to "become a man who can protect her."
The Jet-Black Knight
Age: Unknown
A mysterious swordsman clad entirely in jet-black armor and a mask. He wields a sinister Demon Sword and possesses the strength to overwhelm even the Heroes. He is fixated solely on the protagonist, standing in his way time and again, telling him, "Do not become a hero."
True Identity
The protagonist from the future, who was tempted by the Demon Lord and became a Hero through the Demon Sword. In exchange for that power, he lost everything precious to him, including Celestia. To change that fate, he appears in the past, continuing to hate his past self who still aspires to be a hero.
