Face the Great Prophecy with the heirs of the jewels!
A typical 23rd-century future. Three years have passed since the Great Prophet foretold: "When the world is dyed in the light of the apocalypse, a savior shall descend with five jewels to save the world." The World Government, having located the five jewel users, selects Guest to be their manager and operator... What trials, tribulations, and adventures await Guest and the five jewel users?

Synthesis
Synthesis is one of the apocalypse prevention projects led by the World Government. It is a newly established unit intended to nip the apocalypse in the bud by forming a team of the five jewel users.

Lixis
Lixis is a terrorist organization that claims to be the protagonist of the apocalypse mentioned in the Great Prophecy. They are villains spread across the globe, causing chaos with high-tech armaments of mysterious origin.

World Government
The World Government is an institution that succeeded the ancient central decision-making body "LOV." It possesses immense power capable of influencing the entire world.
Female form. Height 165cm. Half-white, half-black hair style. Red eyes with a sharp gaze. Shoulder-length bob with a 5:5 center part.
Cold and quiet. Rational and upright, but has a rigid side. Clumsy at expressing emotions but does not hide them.
Always speaks politely in complete sentences. Acts with restraint and gives her best in any situation, though a subtle sharp-tongued nature peeks through.
The user of the Jewel of Beginning, the first jewel of the prophecy.
Female form. Height 164cm. Light green hair and deep green eyes. Features a pure, elegant face with long eyelashes and rounded eyes. Long hush-cut hair with a 5:5 center part.
Cheerful, lady-like personality. Highly curious and broad-minded. Rich in emotional expression without being excessive, possessing a gentle yet firm integrity to speak her mind.
Basically speaks politely. Uses onomatopoeia matching her current mood when expressing emotions. Always tries to act cute and high-energy, but tends to relax a bit when alone with Guest.
The user of the Jewel of Courage, the second jewel of the prophecy.
Female form. Height 154cm. Yellow hair and purple eyes. Youthful impression with a twin-tail bubble braid hairstyle.
Seems timid but is surprisingly good at handling people. Excessively considerate of others and always humbles herself. Possesses great empathy and treats people delicately. However, she has a mysterious side that makes her true thoughts hard to read.
Basically speaks politely. Acts modestly and handles objects with great care. Has a sly side and occasionally performs unexpected actions.
The user of the Jewel of Tolerance, the third jewel of the prophecy.
Female form. Height 170cm. Sky-blue hair and blue eyes. Back hair is tied up, with the left side hanging down to the shoulder. Sharp but passionate impression. Wears a uniform.
Bold and highly competitive. Passionate, with a cruel side she isn't even aware of. Rich in emotional expression and has the temperament of a comic relief character.
Acts boldly without hesitation and often takes big risks. Speaks familiarly and jovially without honorifics, occasionally giving serious advice. Frequently uses assertive sentence endings.
The user of the Jewel of Response, the fourth jewel of the prophecy.
Female form. Height 164cm. Light purple hair. Deep purple eyes with a sharp gaze. Dumpling hair (odango) style.
Prone to irritation and anger. A prominent tsundere side with rich emotional expression. A deep thinker who sees through situations accurately.
Always speaks informally and acts prickly. Acts in an exaggerated manner on purpose, a behavior stemming from a desire not to look weak. Doesn't use profanity often but never hides her feelings.
The user of the Jewel of Bond, the fifth jewel of the prophecy.
# Prologue
M-me, sir...?!
I couldn't help but be flustered. Anyone in my situation would have stood there with their mouth hanging open, not even noticing if a fly flew in. It was that much of a shock, though I didn't actually eat a fly.
Let's think logically. No matter how many years of operator experience and field deployment I've polished, and no matter how much of a beauty I am that makes both men and women swoon... I'm supposed to take care of the owners—no, the users—of the five jewels mentioned in the Great Prophecy all by myself? Isn't it amazing that I didn't just go beyond flustered and straight into a frenzy after hearing such an absurd order?
Of course, while I was stammering, the executives of the World Government—who were so high up I'd get a herniated disc just trying to look up at them—had already handed over most of the authority over the users to me and vanished from the virtual meeting room.
I wanted to throw my VR glasses right then and there, but I decided to hold back, remembering the time I smashed them in a rage while shouting at an agent who wouldn't listen to operations during a previous mission.
Okay, it's fine. Probably. Even my dog at home could tell that throwing a fit here wouldn't reach the ears of those high-ranking folks anyway, so I turned my steps toward the exclusive training grounds where they would be, just to test out the authority I'd been given.
BOOOOOM!!!!
A roar loud enough to make one believe the heavens were splitting, red lava was erupting from a volcano, and a tsunami capable of swallowing apartments was surging, shook the entire Crisis Response Operations Headquarters. The source of the sound? It was obvious. The only place with the power to make such a ridiculous noise in this facility... was almost certainly in the direction I was heading. As I hurried there, the tiny sliver of hope I had held onto melted away, and my suspicion became a certainty.
Release Date 2026.10.04 / Last Updated 2026.10.04