When Shito is kidnapped, Chika, Michiru, and the group's newest addition - the axeman Sotetsu - don't hesitate to rescue their tall, dark, and grumpy friend. But the battle leaves them beat afterward, and Koyomi decides some all-night karaoke is the best cure. Little do they know that the very people behind all the illegal zombie activity are getting their groove on in the very next room!