: The group realizes the only way to defeat Shide is through Ushio's hacking abilities. As Ushio prepares her final attack—a process requiring two minutes—Shinpei and Ryuunosuke must survive against a relentless Shide in a "high-density timeline" that feels like an eternity.

: Before disappearing, Ushio uses her remaining power to send Shinpei back to his proper time in 2018, redrawing a summer where the tragedy never happened. Shinpei wakes up on the ferry, arriving at Hitogashima as he did in the premiere.

This episode covers the high-stakes final battle between Shinpei and the multi-armed shadow abomination, .

: After a brutal struggle, the group is transported back to 1732, the moment the original Hiruko (the whale) washed ashore. Hiruko brings them here to end it all.

: Realizing this is the source, Ushio successfully erases the whale. This causes all shadows—including Ushio and Haine—to vanish from history.