Mansion Boma was sealed in a cave beneath a prominent neighborhood under a certain house on Hibarizaka Hill, with its seal being held by the more powerful "Lakia Nail" preventing its power from being fully used and exploited even with its other seals. However due to its sealing under a house, the house it was sealed beneath became notable as a haunted "death-trap", having been involved in killing or chasing away those who wished to live in the house above it for a long time; including a friend of Yohei Hama 13 years prior to current day who left after her parents were killed within that house. When another family who moves in and whose daughter likewise go to the Turboranger's school moves into the house above the Boma sealing site, it once again tries to chase them away to prevent anyone