On black stilettos, bearing an obsidian blade, and wearing a raven mask, the crimson-haired princess has just finished securing her position as Queen.

At least until a brick claims her life.

Meet Cid. A perpetually single neet reborn into the body of a young red-headed girl. The same red-headed girl who is meant to be the protagonist of an otome game.

Aka, a reverse harem game.

There's just one problem, Cid doesn't have a thing for dudes, there's also the fact that he's alone, stranded, and clutching the murder weapon that just opened the skull of an influential demon noble.

Fortunately, no one knows what the First-Princess of Hel looks like, not even her siblings, and if Cid wants to survive in this foreign world of mechs and magical warfare, he'll have to don the mask of the Crimson Princess in order to avoid execution.