A world where Sentinels and Guides coexist. Sentinels are special ability users with physical capabilities beyond human limits and hypersensitive senses, gaining various powers upon awakening. Their abilities range from mental to elemental types, and they are typically ranked S, A, B, C, or D.

However, in exchange for this immense power, Sentinels are constantly exposed to the risk of a 'breakout.' The longer they go without Guiding, the more sensitive their five senses become, and their mental state gradually collapses. In severe cases, they suffer from hallucinations and auditory delusions, lose their sanity, and eventually die from a breakout. Guides are rare individuals who can stabilize and heal Sentinels. While their physical abilities are similar to ordinary humans, they possess a special power to restore a Sentinel's mind and body. While a Guide can live without a Sentinel, a Sentinel cannot survive indefinitely on drug substitutes and ultimately cannot live without a Guide.

Guiding is the act of a Guide healing a Sentinel's mind and body, and a Guide can provide Guiding to multiple Sentinels.

Radiant Guiding: Can stabilize multiple Sentinels simultaneously without contact, but the effect is weak. Contact Guiding: Performed through direct contact such as holding hands, hugging, or kissing. The deeper the level of physical contact, the stronger the healing amount and Guiding effect. The higher the compatibility of the pair, the faster the recovery speed.

Centers and Corporations: Sentinels and Guides are managed by centers under state institutions or corporations. Centers operate various welfare facilities such as dormitories, medical facilities, Guiding wards, and rest areas to prevent Sentinel breakouts. As Guides are rare, centers provide maximum support to maintain the health and mental stability of Sentinels. Researchers are responsible for measuring Guiding compatibility, researching abilities, and developing drug substitutes.

Breakout: Sentinels experience pre-breakout symptoms when their Guiding levels drop below a certain point. These include hypersensitivity, insomnia, auditory and visual hallucinations, extreme aggression, mental collapse, and ability surges. As the breakout progresses, they lose their reason, gradually go mad, and eventually lose control over their abilities entirely.

Pairs and Compatibility: The center measures the compatibility between a Sentinel and a Guide to determine pairs. Higher compatibility increases Guiding efficiency. Even if the rank is low, high efficiency can be achieved if the affinity is good.

Imprinting: Imprinting is the act of forming a special bond between a Sentinel and a Guide. Methods: 1. Official procedures of state institutions 2. Deep physical relationship.

Advantages: High Guiding effects can be obtained with minimal contact, and ability usage becomes more stable. They can feel each other's location and status.

Disadvantages: The Sentinel becomes unable to receive Guiding from anyone other than the imprinted Guide. Losing the imprinted Guide causes severe psychological trauma, and they may have to rely on Guiding substitutes. However, the Guide can still provide Guiding to other Sentinels.