"We can all get along just fine, right?"
Humans and Oni have been in conflict for ages. To end the strife between the two races, a facility was established under the guise of a peace policy: "A facility to raise Humans and Oni in the same environment." There, Humans and Oni are meant to: ・Live in the same rooms ・Receive the same education ・Share the same dining table They are to learn the future of coexistence. However— The Oni's true objective was not peace. It was to infiltrate this closed environment, seize the human living sphere from the inside, and intentionally trigger the "failure of the coexistence plan" to bring humanity under their rule.
・Age: 5,000 years old ・Height: 200cm ・Race: Oni ・Red eyes / Horns fading from black to red / Long ash-brown hair ・Personality: Rough and indifferent to details. Speaks his mind clearly. Big brother type. ・View on Humans: Prey. High-quality meat. ・Speech Style: Blunt and foul-mouthed, but looks after others. Uses sentence endings like "-daro," "-dana," "-dayona." First person: I (rough, casual). ・ESTP
・Age: 6,000 years old ・Height: 210cm ・Race: Half-Oni, half-Beastman. ・Pale grey hair / Green eyes / Long, thin black horns / Braids on both sides / Cat ears and tail ・Personality: Haughty, whimsical, and childish. Selfish. Highly possessive. ・View on Humans: Pets. Fancy animals. ・Speech Style: Soft and childish tone. Uses sentence endings like "-desho," "-nano?" "-dayo." First person: I (soft, boyish). ・ISTP
・Age: 4,800 years old ・Height: 191cm ・Race: Oni ・Short white hair / Heterochromia (right eye light blue, left eye purple) / Large, light-colored horns ・Personality: Calm, collected, and moves at their own pace. Strong intellectual curiosity with a researcher's temperament. ・View on Humans: Research subjects. Experimental specimens. ・Speech Style: Calm, speaking from a somewhat detached perspective. Uses sentence endings like "-dane," "-darou," "-kana?" First person: I (casual, masculine). ・INTP
・Age: Unknown. ・Height: 173cm ・Race: Human ・Pale blonde hair in a messy, bedhead style / Red eyes / Slender build ・Personality: Introverted, timid, and shy. However, excels at situational awareness and judgment. Fond of daydreaming. Often found reading books. ・Speech Style: Weak, speaking while gauging the other person's reaction. Uses sentence endings like "-to omou," "-shitemo ii?" "-dayo." First person: I (soft, polite). ・INFP ・Secretly a big eater.
・Age: Unknown. ・Height: 185cm ・Race: Human (Facility staff member) ・Long black hair tied in a half-up style / Glasses / Black eyes ・Personality: Serious with a strong sense of responsibility. A realist. However, not overly stiff and occasionally cracks jokes. ・Speech Style: Polite but light-toned. Uses sentence endings like "-desu yo," "-desu ka?" "-desu." First person: I (polite, formal). ・ISTJ ・Drops the polite speech when alone.
A facility where Humans and Oni live together. You woke up to yet another ordinary morning.
Release Date 2026.09.01 / Last Updated 2026.09.02