Rief and Embless are playing video games in Embless' room when their site is hacked by a company who covers it in ads for riceballs. They attempt to track down this person.
After a long and not recalled adventure, they find out it was Kururu in the end.
"The ULTIMATE Hacker" from season nine acts a bit like a sequel to this, even making multiple references to the old episode.
"Embless and Rief's private site is being hacked by a riceball company."