Semari Kuru Kyofu! Makai no Tobira Yu yu hakusho : Season 1 Episode 71

A tunnel between Demon World and Living World is opening up in nearby Mushiyori City - an unnatural, deliberately created tunnel. Because of the opening, humans in that city - such as the three schoolboys who kidnapped Yusuke - are acquiring paranormal powers. Genkai defines the parameters to the group of what needs to be done before they can act effectively.