Haunted Mansion

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"Ah, there she is! Harumi! How are you doing?"

Matsuo called for Harumi, as he and Frank noticed she was standing right in front of the abandoned house that had been reported to have an unusually large quantity of Negative Energy.

Negative Energy was a phenomenon happened frequently on Earth, the negative emotions of people in large cities such as Tokyo would fester and release a large mass of darkness.

This darkness in small quantities wouldn't be harmful, but once it gathers enough and merges with the ambient Mana, they can bring forth the materialization of people's darkest desires, fears, and even hatred, monsters.

Monsters appear all over Earth but are usually never seen by the normal person because of the Planet's contingency plan, the creation of Domains.

Within Domains, monsters are contained and are kept away from harming normal people that have no supernatural abilities.