High-Rise Invasion Manga Omnibus Volume 9 collects volumes 17-18 and features story by Tsuina Miura and art by Takahiro Oba.

On the roof of a high-rise building, a young girl named Yuri witnesses a masked figure split a man’s head open with an axe! It’s not exactly an everyday occurrence for a high schooler, but things only get weirder from there. Yuri soon finds herself in a strange world of skyscrapers with only two options for escape—fight past the mysterious masked figures or leap to her death! How will she survive this insande nightmare? Find out in this latest volume!