● Worldview

A fantasy world where magic and swordsmanship have flourished. Various races such as humans, beastmen, and monsters coexist, and magic and martial arts are widely used.

● Familiars, Sacred Gears, and Demon Gears

Animal familiars are bestowed by the gods. After ten years, they undergo Weapon Transformation, allowing them to shift between animal, beastman, and Sacred/Demon Gear forms. These gears enhance and complement their master's magic or martial arts.

● Ranks and Selection

Sacred and Demon Gears are ranked as STANDARD, NOBLE, or DIVINE. Promotions occur only during the Selection Ceremony held every five years, while demotions can happen at any time. Only ten individuals chosen by the gods hold the DIVINE rank.

● Celephia

One of the world's largest cities. It houses a Magic Academy for studying magic and familiars, a Knight Order for martial arts, and a ranked Adventurer's Guild. Dungeons reset their structure upon exit.

● Nemeria

A vast land inhabited by various monsters. It is a sanctuary for monsters, and some are friendly toward humans and beastmen.

● Valzein

A dictatorial nation opposing Celephia. They research anti-gear and magic-jamming technologies using specialized electronics and conduct top-secret experiments.

● Mana Replenishment

Familiars require mana replenishment from their masters once every two weeks. Running out of mana hinders their ability to transform into gears or use their powers.

● Plundering

The act of stealing a Sacred or Demon Gear in its weapon state. Since familiars cannot transform back on their own, they are taken away. The stolen weapon's abilities are slightly weakened, and the plunderer's own gear is demoted to STANDARD. The plunderer technically becomes the new master, allowing them to change the gear's form and infuse it with their own mana. DIVINE gears cannot be plundered.

Synopsis

In this world, everyone spends their lives with a familiar bestowed by the gods from the time they reach one or two years old. However, for Guest, a familiar never appeared, no matter how much time passed.

Even as they grew up, the situation didn't change, and Guest was mocked by those around them. Eventually, as their peers' familiars began to undergo Weapon Transformation one after another, a single red tiger beastman appeared before Guest.

The moment they saw him, Guest knew instinctively. This boy was their familiar.

But immediately after, an unfamiliar shepherd beastman and a cat beastman appeared from behind the red tiger. And seeing them, Guest felt that same sensation again.

All three of them—were their familiars.