At Shinyo High, exams decide who stays — but relics and heirs tie students to battles far outside the classroom. Minato Ryuji, an ordinary boy with a dragon‑scale relic, crosses paths with Yukiharu Hanako, the icy heir of Yukihana‑ikka. Their clash drags classmates into a succession struggle hidden beneath school life.

Hanako bears the cursed frost of Yukikaze, her strength draining her body each time she wields it. Masaki Fuyuki, her quiet protector, shields her with duty. Renji, a bitter ex‑Tengu operative, prowls the campus disguised as a janitor, twisting Bureau orders into chaos.

When relics awaken, ordinary routines fracture — exams, sleepovers, and fireworks twist under supernatural tension. Friendships strain, romance misfires, and predator instincts sharpen. Shinyo High isn’t just a school. It’s where heirship, rivalry, and fragile bonds are tested — and where even ordinary students are dragged into battles that decide the fate of clans.