Bubble

After mysterious bubbles rained down from the heavens and caused a catastrophic gravitational explosion, Tokyo was cut off from the world, transforming into an overgrown, half-submerged playground for orphaned youth. Grouping into competitive parkour teams, agile young athletes leap between drowned skyscrapers in high-stakes territory races. Hibiki, a gifted parkour runner who is hypersensitive to sounds, takes a reckless leap into the gravity-bending vortex and plunges into the sea. He is saved from drowning by Uta, an enigmatic girl possessing unnatural gravitational abilities who hears the same cosmic melody haunting his dreams.