The Green King uses phone application JUNGLE to award users extra power as they gain points. The Green King weilds followers like Gojo Sukuna while living at home. He is the founder of JUNGLE - Nagare Hisui, also known as the Green King. Sukuna, who has been attracted to the "dream" that Nagare strives for, becomes the highest ranked member of JUNGLE and challenges Yukari Mishakuji, the strongest member of JUNGLE in order to finally meet Hisui. (thetvdb.com)