Itsuki, who lives on welfare with her sick mother and baby sister, has given up on her dream of becoming a nurse and been hopeless for the future. One day, a transfer student named Kazuma, who has a secret about falling behind in his previous private middle school, joins Itsuki’s class. He also struggles under pressure from his elitist father. Sparked by this encounter, they break out of their circumstances and gradually find hope for the future on their own, involving many adults around them.

In pursuit of clues to find his father, Ging, Gon sets his sights on the legendary Hunter-exclusive video game, Greed Island. Together with Killua, he heads to Yorknew City to bid for it at the world's greatest auction. After a costly conflict with the Phantom Troupe leaves them bankrupt on auction day, the duo shifts tactics. They join the game as hired players for Battera, the billionaire who purchased every copy. Inside Greed Island, Gon and Killua clash with skilled participants like Genthru, Tsezguerra, and Goreinu. Their journey takes a decisive turn when they meet Biscuit Krueger, a formidable trainer who puts them through a grueling regimen. As their combat abilities soar, they must confront the game's formidable enemies and unravel its secrets. The ultimate challenge awaits: Can Gon clear the game and finally meet Ging?

Stage xxxHOLiC is an all-male cast stage play adaptation of the manga written and illustrated by CLAMP.