Nanairo Reincarnation

On the verge of graduating college, Makoto Kagami inherits his late grandfather's estate, planning to make the most of his new home. But his plans are disrupted when his childhood friend Iyo, revealed to be a zashiki-warashi, introduces herself, looking exactly as he remembers her from a decade ago. Then, a demonic woman named Kikyou appears. Soon after, a beautiful police detective arrives, begging him to take up his family's duty: to help wandering spirits pass on and assist with supernatural crimes. Makoto has the clairvoyant ability to see spirits—a family legacy. When a colossal case beyond imagination comes his way, will he, along with his demon familiars, rise to the challenge and become the worthy successor he's meant to be?