Sato Yasuhiro was the first son of the Sato family, an old samurai lineage dating back to the Edo period, though now nothing more than an ordinary family. The family had strict rules for many generations.
Though such traditions had slowly died down, some rules were still in place to teach discipline and other such notions.
Most prominent among them was that every male had to be taught swordsmanship—primarily Kenjutsu.
Fortunately or unfortunately, Yasuhiro, who had lived once, learned how to endure and adapt quickly to his environment.
His parents called him a prodigy in Kenjutsu and hoped to see him win medals in kendo classes.
He once thought these classes were useless, but once he realized what world he lived in, the once somewhat lazy Yasuhiro began to train with his sword vigorously.
In his youth, he won many kendo competitions, earning medals and making the elders of his family proud to call themselves a samurai family once more.
For this, he was gifted a samurai heirloom—his family's way of guaranteeing his future as the Head of the Sato Family.
Developing muscles from a young age helped him become more athletic than most of his peers. And in secret, he recalled every piece of information involving Magecraft and slowly etched it into his mind, painfully engraving his body with magic circuits.
Though he lacked the generational quality of a mage family's circuits, he made up for it with the vast knowledge he obtained from being an outside observer of this universe.
After countless years of sweat and blood experimenting on his own body, he finally succeeded in engraving a Strengthening Magecraft. With a mental switch, he could become stronger than the average human for a few seconds, at the cost of straining his body.
Though he didn't plan to confront a Servant directly, it was a safety measure in case a Servant ever targeted him.
Along with his body, he used his gifted katana to etch invisible paths along the blade.
Using the same principle as with his body, he engraved Strengthening Magecraft onto the blade. It wouldn't cut mountains, but it could still sever most thick armor.
With everything building up to this moment, he felt more ecstatic than ever. He had dreamed of this day every night, rehearsed his lines, actions, and created backup plans upon backup plans.
Several dreamcatchers were strewn about, several medieval swords originating from England is placed around the summoning circle, and a small bundle of red hair was placed in the center.
This was his only hope of getting Artoria.
Finally, with a drop of blood on the summoning ritual, a bright light filled the basement.
"Are you the master of mine?" a voice asked, as red, piercing eyes stared coldly.
Her dark visage, hidden beneath the shadows, obscured much of her figure. One could only make out a simple eastern robe similar to a kimono, though this one was more rugged and simpler in design.
In her hand, she held a sheathed ōdachi. The sheath was very worn, with many spots bearing sword marks and scratches.
The light in his eyes, which had been shining, dimmed considerably, and a frown quickly formed on his face.
"Hmm... I don't remember any Servants that look like you. Who are you?" he asked, trying to suppress his displeasure, though it unknowingly influenced his tone.
"I... I do not recall." Her brow furrowed slightly, as if trying to remember something.
"Of course I get a damn Servant with Alzheimer's. What shitty luck this is," he cursed under his breath for a few moments before taking a deep breath.
"It's alright, it's alright. Get yourself together. You already made plans in case this happened, right?" After regaining his composure, he returned his gaze to his Servant, who was staring at him with a somewhat bewildered look.
"Don't look at me like that. It's just... an illness of mine," he faked a cough and continued. "Alright, let's start with introductions. My name is Sato Yasuhiro, the first and only son of the Sato family, winner of the national kendo Olympics, and devilishly handsome, if I say so myself," Yasuhiro said with a hint of sarcasm.
"I believe you still retain the memory given to you regarding which class you belong to, right? Right?" A hint of worry crept into his voice.
"Don't worry, Master. Though the memory of my life is gone, the information bestowed upon me by the Holy Grail is still intact."
"Huuu, thank the gods. At least this one isn't fully a defect." The Servant's eyebrow twitched a little after hearing his comment.
"So? What is your class?"
"My class is--"