Soul Eater, Vol. 5, v. 5

"Maka is a weapon meister, determined to turn her partner, a living scythe named Soul Eater, into a powerful death scythe -- the ultimate weapon of Death himself! Charged with the task of collecting and devouring the tainted souls of ninety-nine humans and one witch, Maka and her fellow meisters strive to master their weapons as they face off against the bizarre and dangerous minions of the underworld. But the meisters' own personal quirks may prove a bigger obstacle than any sultry enchantress!" -- frompublisher's web site.
Weapon Meister Maka is entrusted with the task of reaping tainted souls with the help of her partner, a living scythe named Soul Eater, as they and the other Meisters face off against the bizarre minions of the underworld.
On the night of DWMA's anniversary celebration, every meister and weapon in Death City has gathered at the school for an evening of music and dancing. Little do they know that the witch Medusa is about the crash Shinigama-sama's party. Trapping the meisters inside, the witch makes her way to the chamber where the First Kishin is imprisoned. Will the few meisters who've managed to escape be enough to prevent Medusa from rousing the madness that slumbers far below in the Kishin's domain?