High-Rise Invasion is a oNA (web) anime that premiered in winter 2021, produced by Zero-G.

About the production: the story comes from a manga, there are 12 episodes of about 25 minutes and its current status is "finished".

Its main genres are action, horror and mystery, with themes such as Survival, Death Game, Battle Royale and Female Protagonist.

On AniList, High-Rise Invasion has an average score of 66%, a good score, and appears on 138,801 users' lists.

High school student Yuri Honjou finds herself lost in an “abnormal space” where countless skyscrapers are connected by suspension bridges and “masked figures” mercilessly slaughter their confused and fleeing victims. To survive in this hellish world, she has two choices: kill the masked figures or be killed. Yuri is determined to survive in order to destroy this irrational world, but what will be her ultimate fate? (Source: Netflix)

Official synopsis from AniList.