Summary
Matsuo Mina, a high schooler obsessed with designing the ultimate gang leader uniform, is suddenly attacked and knocked unconscious. She awakens in a strange steampunk world shrouded in fog, filled with turning gears and snaking pipes. There, she meets Leon Aster, the notorious “Delinquent Marquis”—a vampire biker who commands a steam-powered machine. His fierce presence reminds her of the gangster movie idols from her youth, inspiring her to create battle gear for him. As Mina pursues her ambition, startling secrets come to light in this wild romantic comedy blending isekai, vampires, and delinquents in a thrilling steampunk setting.