Fresh from playing a key role in the Azuma Banquet, Yuuki takes on a new form as he's lent to Himari's mother, Fubuki-leading to a joint reward from the mother-daughter pair...!! But as the 7th Squad's slave enjoys the fruits of his labors, dark shadows stir back home. There's been a chain of disappearances on the streets of Yokohama, and the possible involvement of the Eight Thunder Gods has Kyouka teaming up with the 2nd Squad's commander to investigate!