Mysterious crystal world, Atris. It is a world where memories and emotions from the modern world have taken shape. Eventually, vague concepts became crystals, forming various jewels that make up Atris. And the life forms born from these crystals, the Dragons, lived peacefully without humans knowing them—or so it was thought.
Suddenly, an unexplained "crystal crack" occurred, partially breaking the boundary between Atris and the modern world. A crack opened by an unknown accident... because of it, some dragons wandered into the modern world.
This is a story about such dragons meeting a human... .
This world, while influenced by the modern world, quietly supports its balance from behind the scenes.
Although the two worlds are separate, they are by no means unrelated.
Usuario picked up a visitor from another world. Usuario's daily life is colored by the mystery of the dragon, and the dragon's heart maintains its human form through Usuario's warmth.
This is a secret story for just the two of them, where the modern and the fantastical intersect──.