Itto Vorspiel Manga Summary
From AQUA Scans:
At the outskirts of town in a mansion, which is rumoured to house devils, live the masters of the household: the young miss (master?) Lily and the strange young master (a NEET) It. We follow them as they carry out strange requests, ones which normal humans cannot settle themselves.
Yet again, today, a young girl that wishes to find her black cat has paid a visit…
Original at GanGan ONLINE.