A collaboration campaign between the retro horror idol group “Phantom Theta,” produced by Ado, and ROUND1 will be held at all ROUND1 locations from 10:00 a.m. on September 14, 2026, through December 13. We’ll give you a comprehensive rundown of everything, including all four collaboration drinks inspired by the four members, collaboration food items, order-with-purchase gifts like standee coasters and acrylic keychains, a karaoke collaboration room at the Kichijoji location, a singing campaign, and a bowling score registration campaign.