Utsuro, Oboro, Sagiri, and Zack have arrived at a building that was used to research something.

The vampire Miharu Kiryu has moved into the Otogi household. Because he's a vampire, he tends to be a nightowl and lazily doesn't wake up until past noon. On top of that, he needs to siphon life energy to survive, so he immediately gets some from Morihito after waking up. He may not do well in a communal living environment, so will this further power up the chaos in the Otogi house?