It opens with a student council summons and then, without warning, someone starts singing. That is the deal here: Dance with Devils is a full-blown musical reverse harem, and it commits so hard to the bit that Rem Kaginuki and the rest of the council will stop a scene cold to belt their intentions at you in three-part harmony. The Grimoire plot is held together with tape and vibes, Ritsuka spends a lot of the runtime being told things rather than doing them, and honestly none of that is the point. The point is Roen the little dog being more menacing than any of the vampires, Lindo's exorcist brother act curdling into something much weirder, and Shiki and Urie circling like they know exactly what show they are in. Otome fans clocked this immediately. You do not watch it because it is good, you watch it because it sings at you and you cannot look away.
Ritsuka lives an ordinary life until her mother vanishes without a trace, leaving her with more questions than answers. When the student council summons her, she learns her family has been caught between two supernatural forces: vampires and devils, each desperate to claim the Grimoire, a book of forbidden power that could reshape the world. Suddenly immersed in a dangerous game she never asked to join, Ritsuka finds herself surrounded by attractive demons and bloodsuckers, each with their own agenda. Some claim they want to protect her. Others have hidden motives. She can't tell who to trust, and every choice brings her closer to uncovering painful family secrets. What begins as confusion transforms into something far darker and more seductive. The line between enemy and ally blurs as Ritsuka navigates supernatural politics, genuine romance, and the constant threat of becoming a pawn in someone else's endgame. Survival means learning who she can actually trust in a world where supernatural beings rarely play fair.