What happens when Dementia reeks havoc on Flug and Black hat messing up one of the scientists inventions, causing problems that would last overnight. Just so she can have her fun without getting yelled at. Something bad happens to the demon and human, all while rendering Black hats powers useless. What had she done now? 𝐒𝒯𝘈Ⓨ︎ 𝕿🇺 𝔫🅝︎𝖤ᑎ🄳~ (Oneshot)