"Yukino, what do you want for dinner tonight?"
"I'm already full, Ryuya, you eat by yourself."
Because they had just started university, Yukinoshita's father and mother discussed it and decided to let Ryuya and Yukino live separately to train their independence.
They rented an apartment near Shuchi'in University for the two of them.
After returning to the apartment, Ryuya noticed that Yukino seemed somewhat angry. She directly closed her bedroom door and wouldn't come out no matter how much he called.
"What's up with this girl?"
Puzzled by Yukino's inexplicable mood, Ryuya thought about it and figured that for a young girl, being angry and tsundere was normal. As her older brother, he should just indulge her a bit.
He cooked dinner for two, then kept Yukino's portion warm on the dining table. Ryuya returned to his own room and looked at the day's news.
"Report: Skeletons of over ten bodies discovered at an abandoned factory in Kyoto, suspected to be the work of Ghouls."
"Big news! The Einzbern Family is entering Japanese Market, will form a new partnership with the Shinomiya Conglomerate!"
"At around 2 AM this morning, residents reported a giant white swan appearing in the sky, comparable in size to an airplane."
Looking at the various news items on his phone, Ryuya felt a headache coming on.
Yes, initially he thought he was in just an ordinary comprehensive Anime World with lots of slice-of-life elements. But as he grew older, he realized this world wasn't as simple as he imagined.
Ghouls, Denizens of the Crimson Realm, Magi, Men in Black assassins... all sorts of supernatural forces operated in this world. The pressure was really on for him, an ordinary person.
'Sigh, there's more and more news about these guys lately. Should I take the Yukinoshita Family and move somewhere else?'
Pondering whether to take his adoptive family and run away, just as Ryuya was considering this, a cold prompt sounded in his mind.
[Hello, Host. The Justice Simulator has been successfully bound. Wishing you an upright and virtuous life.]
'I've been bound to a system?'
Slightly stunned, having already experienced transmigration and various supernatural forces, Ryuya wasn't too surprised by the system's appearance.
'Justice Simulator? What are your functions?'
With a thought, Ryuya asked.
[This system's core mission is to assist the host in simulating lives and obtaining corresponding rewards based on the completed lives.]
[This system can simulate three lives per day. Life simulation ratings are D, C, B, A, and the highest S-rank.]
[As this system advocates for justice, high-level ratings require the host to make righteous choices.]
'Simulate lives? A Life Simulator?'
Having played life simulation games before, Ryuya was excited.
'Just earlier I was wondering how to deal with this world's supernatural forces, and now system assistance arrived. I am the Chosen One, right?'
'System, I want to simulate a life now.'
[Confirming life simulation. Currently, the host only has one option: Life - Legendary Lord of Britain. Please achieve a high-level rating to unlock more choices.]
'Legendary Lord of Britain? Not a life from my original world?'
Looking at the option in his mind that seemed like a game scenario, Ryuya clicked confirm.
[In view of the host's first life simulation, one random talent will be awarded.]
[Congratulations to the host for obtaining B-rank talent: Mana Affinity (B.]
[Simulation begins.]
[You are born.]
[As an absolute lifeform born with innate mana affinity, the family you were born into seems somewhat complicated. No midwife, no parents, only a cold gaze fixed upon you.]
Vaguely, Ryuya seemed to see a dim room, flickering lights, and an old man holding him, his face resolute, a pair of silver dragon eyes staring at him.
'Wait, dragon eyes?'
A sense of foreboding suddenly arose. Ryuya watched as the old man holding him slowly spoke, "To think... it actually succeeded."
Vortigern Pendragon.
As the White Dragon of Britain, he was mystery itself. Having foreseen Britain's future and seen the signs of the world's destruction, Vortigern did not want this nation to perish.
"An infant who does not cry? As expected of one who inherits the Pendragon Bloodline. From today, you are Isbel. Isbel Pendragon."
[Facing Britain's demise, the Vile King Vortigern used forbidden magecraft, combining his own bloodline with the phantasmal species of the White Dragon to create a successor. This is you, Isbel Pendragon.]
Looking at the text prompt in his mind, Ryuya's expression was somewhat dazed.
Not because of his birth, but because of the old man before him.
Vortigern Pendragon, brother of King Uther, uncle of Artoria, infamous throughout Britain for his wickedness.
Ignoring Ryuya's thoughts, the simulator continued the life simulation.
[Your birth is very important to Vortigern. The Vile King, originally solely devoted to Britain, unconsciously began to regard you as his true child while raising you.]
[Your talent is exceptional. At a young age, you inherited Vortigern's power. By age twelve, you could activate the White Dragon Bloodline within you.]
[In the year you turned thirteen, Vortigern and King Uther engaged in a great battle. This conflict ended with Vortigern's victory. King Uther retreated to Camelot.]
[In the year you turned fifteen, you decided to travel and gain experience. Walking the land in the late Age of Gods, you, still young, quickly began to make a name for yourself and became known by many.]
[On this day, you arrived at Camelot, determined to see what your father's rival was like. You entered the city incognito.]
[Contrary to your expectations, instead of the paradise you imagined, you found Camelot to be a dilapidated capital, its commoners starving and destitute. You felt Uther was unworthy of being Vortigern's enemy.]
[Feeling bored and determined to leave Camelot, you saw an old castle outside the city. Its atmosphere was eerie, clearly indicating something was amiss.]
[Your choice? A. Continue with your plan, leave Camelot. B. Enter the castle, see who lives there?]
'There are choices too?'
Staring blankly at the choice before him, Ryuya realized that during the life simulation, his entire being was immersed in the scenario, as if experiencing a brand new world.
He could remember his previous transmigration and everything about himself named Isbel. He even knew he was in a life simulation, but the realism of it was simply... irresistible.
'I choose B, enter the castle.'
[You enter the castle.]
[Inside this castle, you meet its owner. She is a beautiful girl with long silver hair, about two years younger than you, but already blossoming, displaying a charm beyond her years.]
"Who are you? Did Father send you to watch me?"
Seeing Ryuya's figure, the girl let out a self-mocking laugh.
"Even after imprisoning me here, he's still not at ease? Heh..."
The familiar face was still youthful. Seemingly prepared for Ryuya's arrival, the light in the girl's eyes was like that of a prisoner awaiting death.
Despairing and cold.