Ourania is a maimai original song composed by satella and performed by Nakuru Aitsuki (藍月なくる), introduced in maimai DX PRiSM on October 25, 2024. At 204 BPM, the track carries a driving, fantasy-infused energy that matches its celestial title, Ourania (Οὐρανία) is the Greek muse of astronomy. The song runs 2 minutes and 23 seconds and was produced with visuals by cell / michele and Fujichoco (藤ちょこ). The track is the centerpiece of the Heaven Area 8 (天界ちほー8) story segment, which follows two characters: Alma, a quiet bookworm who keeps to herself, and Rag, her gifted childhood friend. After a traumatic event leaves Rag cold and distant, Alma chooses to stand beside her as her first knight. This narrative of devotion and enduring bonds is woven into the song's lyrics, which speak of chasing distant shadows, freezing flames, and unraveling the veil toward a spiral beyond.