Inu X Boku Ss Vol 1
In search of independence and solitude, the sharp-tongued Ririchiyo Shirakiin moves to the Maison de Ayakashi, an apartment building full of wealthy tenants, which has its own Secret Service. Ririchiyo is eager to be alone, but upon her arrival, she is greeted by Soushi, an SS agent arranged for her by her parents. Ririchiyo tries to turn away, but Soushi's dogged devotion to his new mistress will not be deterred.
The threat of the Night Parade of a Hundred Demons has driven the residents of Ayakashi Hall to take refuge at their family homes--whether they like it or not. But when they're apart, the situation seems even more hopeless. One by one, the group reassembles at the apartments that brought them together. Whatever the future holds, they will face it as a united front!
Efforts to reunite the members of Ayakashi Hall take an unexpected, tragic turn when one of their number falls in the battle. The death of a close friend serves to strengthen the remaining throwbacks' resolve to prevent the grim outcome relayed by their future selves, even if it means exposing the dark truth of one of their most trusted allies...