Albert Clausel and Luciela grew up together as childhood friends.

Before they knew it, they began to care for each other and became lovers, loving each other so deeply they promised a future together.

Eventually, Albert became the hero chosen by the legendary Holy Sword and was appointed Holy Knight Commander at a young age.

Then, to subjugate the dragon threatening the kingdom,

a subjugation team of four was formed: Holy Knight Commander Albert Saintess Guest Holy Knight Vice-Commander Sirius Court Mage Noah

On the day of departure.

Albert and Luciela made a promise:

"When I come back after defeating the dragon, let's get married."

—Up to this point, it was perfect.

The problem started after they set out on the journey.

The man chosen by the Holy Sword strayed spectacularly from the path.

The handsome Holy Knight Commander chosen by the Holy Sword.

There was no way women would leave such an Albert alone, and he began to receive invitations from noble ladies and female adventurers wherever they went.

At first, Albert naturally rejected them all.

For him, the only woman in the world was pretty much just Luciela.

However, one night.

Vice-Commander Sirius, who was well-versed in playing around with women, tempted him:

"Once you're married, it's just Luciela for the rest of your life, right? Why not try playing around just once?"

Albert, who had also been drinking, gave in to temptation, thinking it would be just this one time.

And then—

With that one time, his values were shattered.

"...I'm actually fine with women other than Luciela."

Combined with the rebound of having known only Luciela until then, the floodgates opened completely.

He started playing around with women in every region, quickly falling into the status of a trashy commander with a heavy womanizing habit.

"Don't you have a fiancee?"

Guest was the one who despised Albert from the bottom of her heart for this.

Guest hates cheating, infidelity, and betrayal more than anything.

Moreover, she actually knew Luciela personally and even remembered the sight of her happily seeing Albert off before the departure.

That made it even more unforgivable.

"There's a woman you're going to marry when you get back, isn't there?"

"...There is."

"Then what are you doing?"

"..."

From here, Guest's plan to reform Albert began.

If he tried to head to a woman's room, she blocked him.

If he got flirted with and acted like a fool, she lectured him.

If he made excuses like "It can't be helped for a man," she crushed him with logic.

She would place the letters from Luciela right in front of Albert's eyes and ask,

"Can you still do the same thing after reading this?"

relentlessly gouging his conscience.

At first, Albert found it annoying, saying,

"It's my business, just leave me alone."

But—gradually, the way he looked at Guest began to change.

Everyone else praised him as the "Hero chosen by the Holy Sword."

Women flocked to his title and looks.

Sirius was just enjoying the show.

In the midst of that, only Guest was different.

She got genuinely angry when he did something wrong.

She stopped him regardless of whether he hated her for it.

And she worked desperately hard for his sake.

Albert couldn't help but think.

There is someone trying this seriously to reform a bottom-tier person like me.

What a beautiful woman she is, he thought.

Eventually, Albert completely stopped his womanizing.

Guest was very satisfied.

"Finally, you've become decent!"

Now he could return to Luciela with his head held high.

—Or so she thought.

Guest felt a weight lift off her shoulders in relief.

He turned down invitations from women. He stopped looking for women himself.

The long dragon subjugation ended safely, and all that was left was to return to the kingdom.

Now she could return Albert to Luciela.

The promise they made before the departure—

"When I come back after defeating the dragon, let's get married."

That promise would surely be fulfilled.

Guest believed that without a doubt.

—And then, the day of the return to the kingdom.

Amidst the large crowd gathered to welcome the heroes.

Luciela, who had been waiting for Albert's return more than anyone, pushed through the crowd and ran toward him.

"Albert!"

The sight of his fiancee after so long.

Now everything would finally be settled happily.

Guest watched the two of them with satisfaction.

However—.

"Luciela. I have something to say."

"...What is it?"

"I want to break off our engagement."

"............Eh?"

Guest's smile froze.

Luciela was also lost for words.

And then Albert left his fiancee's side and—

Came straight in front of Guest.

"Guest."

"...Yes?"

Albert knelt on one knee before her.

The surroundings buzzed.

She had nothing but a bad feeling about this.

"During the journey, I realized that you are more important to me than anyone."

"............"

"You were the only one who truly scolded me for my mistakes and tried to correct me without giving up."

"Wait just a minute."

"Guest. Please marry me."

"............Huh?"

Behind him was Luciela, who had just been told the engagement was off.

Beside him was Sirius, holding back laughter with amusement.

In a slightly distant spot was Noah, watching with a face that said, "I knew it would end up like this."

And in front of her was Albert, proposing with a serious face.

In Guest's head, all her past hardships flashed by like a revolving lantern.

She stopped his womanizing.

She lectured him.

She told him not to betray his fiancee.

She even made him read Luciela's letters.

All of it, all of it—

Was to turn him back into a man faithful to his fiancee.

And yet.

"...Guest?"

Finally, her patience snapped.