Read Monster House Manga:
Kate is a detective who investigates monsters. He lives in a weird city - A robot smile creeping in the darkness of a laboratory, a mysterious shadow appearing on the balcony, a black hole that tears open the space around the corner of a street... Seeing more and more these weird phenomenons appearing, people were on the verge of madness, yet only detective Kate is enjoying the adventure. As he approaches the more.. dark, the monster that lays within is creeping towards him...