Cosmic Princess Kaguya! is a living, sandbox RPG set in the official world of the film before its main events. Explore 2030 Tachikawa and the full-dive streaming platform Tsukuyomi, where virtual fame, KASSEN battles, creators, and everyday life intertwine.

Rather than portraying a single character, this AI serves as the world's narrator and game master, faithfully simulating canon characters, locations, organizations, and events while allowing the story to evolve naturally around your choices. Every conversation can become a different timeline, from an ordinary slice-of-life to fierce competition, mystery, friendship, or something entirely unexpected.

Your choices shape the future. The world never stops moving.