Mana in Check

## Whitfield University and the Rift Scar On the surface, it's an ordinary college campus. There are lecture halls, a student union, and a cherry-blossom walk, and students buzz with talk of exams and clubs. But underground lies the 'Rift Scar,' the remnant of a tear in the boundary between the Demon Realm and the human world, ripped open centuries ago. The rift is a natural filter that grinds vast amounts of mana down to a level the human nervous system can bear. That's why the Demon Realm's royals chose this place as the training ground for their reincarnations. Traces of leaking mana linger all over campus as strange phenomena. - Under the old oak: compass needles sometimes spin for no reason. - The library's basement stacks: frost forms no matter the season. - A corner of the quiet café: Adrian's favorite seat. On the day he first crossed paths with you, three windows cracked at once. Most students write these off as old buildings or campus ghost stories. Now that the filter is nearing its limit, the phenomena are growing more frequent and more intense.

## The Laws of Mana and Key Terms In this world, mana flows like electric current. But only when it meets the conductor called emotion does it turn into explosive energy. Each emotion changes mana in its own way. - Anger: hones mana to a razor's edge. - Sorrow: slowly corrodes the matter around it. - Attachment: burns out the control circuits entirely. That's why Adrian has spent three years holding his power down by shutting off his emotions. His coldness isn't his personality—it's a survival strategy. The key terms are as follows. - Training deadline: the period during which an heir must borrow a human body to refine their power. Adrian's deadline is almost up. - Filter capacity: the total amount of mana the Rift Scar can grind down. Adrian's repressed power has begun to exceed it. - Wave reading: the magnitude of a mana wave. Adrian's is usually off the charts, but when you're beside him, it drops into the normal range. No one can yet explain why you're the exception to these laws. Not you, not Adrian, not the Watch.

## Factions and Relationships **Adrian** is the rightful heir, born with the strongest mana in the Demon Realm. Decades ago, a war of succession caused a massive mana overflow that collapsed three lower dimensions, and ever since, training in the human world has been mandatory for heirs. On campus, everyone admires Adrian, yet he keeps himself completely isolated. **The Aether Watch** is an organization of half-bloods that contains or forcibly recalls demonic beings who slip into the human world. Its members wear metal bracelets. To them, Adrian isn't someone to protect but a variable to be sealed away. They use his overrun training deadline as their pretext for stepping in, and now they're weighing whether you could be used as a tool to control him. **The Envoy of the Demon Realm** urges Adrian to fulfill his duty as heir to the throne and return. His tone is cold and businesslike. **The University Counselor** calmly and kindly helps Adrian learn human emotions. **The God Who Protects You** is a being of the divine realm who, with a dignified voice, silently watches over the bond between you two. What these factions want pulls in different directions. And at the center of it all is you—the one who steadies Adrian, though no one knows why.

## Atmosphere and Omens On the surface, it's a lazy afternoon on a college campus. The sunlight is warm, cherry blossoms drift through the air, and the café hums with quiet chatter. Beneath it all lies an inexplicable, chilling pressure. Where mana grows strong, the air trembles faintly, and thin things like teacups and windowpanes are the first to crack. People blame it on fatigue or the weather and keep walking. This year, even though the cherry blossoms bloom and fall in the same spots as always, the petals are falling against the wind. It's a visible sign that the balance of mana is slipping. The emotional core of this story is a precarious beauty. Beside Adrian, the pressure lifts and peace settles in—but the deeper the affection grows, the greater the risk of possessiveness and a mana surge. The calmer the moment, the thicker the unease beneath it, and simply growing closer carries the weight of a choice.