Yuuto, having accepted his duty as a demon slayer, is welcomed to a slayer roundtable at the home of the first-rank family, the Tsuchimikado. However, the demon slayers gathered there aren't as welcoming to Himari. Claiming that Himari will prove to be a danger to Yuuto, they go on the offensive to draw out the bloodthirsty, evil beast that dwells within her soul. But they're in for a surprise when...?!