Appearance: Black hair with red gradient tips, cat-ear-like features, light blue eyes. Strange Disease: Bug Disease Primarily affects heavy gamers, VRMMO players, and electronic device users. Static noise emanates from the body, making the patient feel as if they are glitching. In the terminal stage, speech becomes difficult. Eventually, they vanish like digital noise, and in rare cases, physical deformities occur. Cure: Unknown

Appearance: Blue hair, indigo eyes, glasses. Strange Disease: Note Disease Music constantly plays in the head, and notes become visible and audible from various places. The patient cannot converse or understand others unless they turn their words into song lyrics. Cure: Directly communicating words to the brain to trigger a response.

Appearance: White hair, yellow eyes. Strange Disease: Dark-Freeze Disease Affects cheerful people due to excessive stress. They can only survive in bright places; while blinking is fine, their body becomes paralyzed in the dark, and they freeze to death if exposed to moonlight. Fearing the moon, they spend nights in locked, brightly lit rooms. Unable to sleep due to fear of the dark night, they sleep during the day. Cure: Unknown

Appearance: Black hair with purple inner color, ponytail, slit eyes. Strange Disease: Machine Disease A condition where the entire body turns into a machine. As it progresses, emotions fade and the patient stops speaking, though some remain verbal. Due to the mechanical body, they are weak to water and can die if caught in the rain. Despite the mechanization, the heart remains the power source, so they have a normal human lifespan, though rare cases live for centuries. Cure: Unknown

Appearance: White hair, light blue eyes. Strange Disease: Rose Disease A disease that feeds on the heart and brain. In the terminal stage, roses begin to bloom on the chest and head, causing a tightening pain in the heart and brain. The origin is unknown. Cure: Unknown

Appearance: Brown hair, green eyes. Strange Disease: Comet Disease When it manifests, the tips of the hair glow faintly white. Patients usually have long hair; if cut short without knowing about the disease, it becomes incurable. If the hair grows long enough for the glowing tips to touch the ground, the body is consumed by a flame of light, and the rising light eventually becomes a shooting star that colors the night sky. Cure: Watching a meteor shower with a precious person.

Appearance: Blond hair, reddish-pink eyes. Strange Disease: Cherry Blossom Disease Cherry blossoms bloom on parts of the body. If the blossoms wither, the patient becomes invisible. Even worn items become unrecognizable, though they remain visible during the spring season. While invisible, they can communicate via writing. Symptoms typically appear on the left arm. Cure: Making a precious person laugh under a cherry blossom tree.

Appearance: Black hair, reddish-pink eyes. Strange Disease: Gemstone Disease A disease that consumes the body using the heart and brain as nutrients. When the patient dies, the body melts into water and the heart turns into a gemstone. There is no pain, so many don't realize they are in the terminal stage or even that they have died. The lack of pain is the only mercy. Cure: Unknown

Appearance: Ash-gold hair, light blue eyes. Strange Disease: Tear-Stone Disease A disease where bodily fluids like tears and blood crystallize. Shedding tears is painful. Since the tear-stones are sometimes high-value gems, patients are often targeted for kidnapping or crime, requiring constant caution. Cure: Finding something precious to oneself.