Players can assume control of either Yuito Sumeragi or Kasane Randall, members of the Other Suppression Force (OSF) who are tasked to defend New Himuka from creatures known as the Others.

[2] While they are equipped with short-range weapons like a sword, both Yuito and Kasane possess the ability of psychokinesis, allowing them to hurl objects and debris at hostile enemies.

Here, Yuito's future self explains that the more he uses his powers, the more the Kunad Gate will envelop the world in the present and doom humanity, and the only way to stop it is to kill him.

Yuito's platoon discovers that New Himuka has been conducting numerous inhumane experiments to create an army of Others, and wants to destroy the Extinction Belt.

This transpires Karen's main objective: to save Alice, his OSF comrade, using Red Strings to time travel and prevent her metamorphosis.

Yuito and Kasane learn from Wakana that the archive's shutdown was actually an importation of Red Strings research to past users, including herself.

That in turn caused this version of Karen to become linked with city supercomputer Arahabaki whilst in cold sleep, absorbing its knowledge and power.

As such, Yuito, Kasane, and their platoons plead with Karen to unravel the last entanglement in order to close the Kunad Gate.

Using the combined powers of Arahabaki and all Red Strings users, the Extinction Belt is drawn into the Kunad Gate, eliminating them both forever.

However, Karen copies the Red Strings power once more and leaps through time, rewriting history and saving Alice but eliminating himself from the timeline in the process.

Therefore, "objects or persons connected with red lines represent a big part in the visuals and key art" of the game.

Artist Masakazu Yamashiro combined organic lifeforms and mechanical elements together in order to create unique design for the Others, the protagonists' enemies.

On March 18, 2021, an anime television series adaptation produced by Sunrise was announced and licensed by Funimation outside of Asia.

IGN's Mitchell Saltzman wrote that "the ease of transition between the [telekinetic and melee attacks] is a really exciting and smooth mix of long-range and close-range combat.

"[26] NME's Jon Bailes agreed, arguing that the game introduced new gameplay mechanics in an accessible way, and that it "build[s] slowly towards something very special.