High-school girl Yuri suddenly finds herself on the rooftop of a high-rise building.<br />She's trapped in a bizarre world surrounded by skyscrapers, where a masked man cracked open a man's head with an axe before her eyes.<br /><br />The original author of 'Ajin', Tsuina Miura works in collaboration with Takahiro Oba, the artist of 'Box!', to bring you this thrilling skyscraper suspense! (MangaUpdates)