Following the defeat of the Hydra, and also following Sage's regaining of her powers, the group of people in the room discover that The End is still alive because it left behind a fragment of its power within the Ancient's Technology, which then grew over the months. And suddenly, Marinette and Adrien, along with Tikki and Plagg, all begin feeling the Cyber Corruption within themselves. And a few minutes after this happened, all of Marinette and Adrien's friends, most of whom are transformed in their superhero forms, as well as Wang Fu, Marianne, Su-Han, Mr. Damocles, and Caline Bustier, while also vanishing back into Cyberspace, supress the corruption from Marinette and Adrien, who then transform into Ladybug and Cat Noir. After that, they all quickly use a Purple Portal, which Tomoe and Felix built, to guickly warp to Ouranos Island
Marinette and Adrien: *suddenly feel the corruption again* AGH!!! Rggh!!
Emilie: *notices this* Adrien!!
Sage: *spots this* Oh no! The cyber corruption has returned to them!
Gabriel: This is very bad!
Mayor Bourgeois: Quick, call all of Ladybug and Cat Noir's allies!
Tomoe: Right! And Gabriel, be sure to get Su-Han, Fu, Marianne, Mrs. Bustier, and Mr. Damocles as well!
Tikki: And hurry! *gets the corruption* Agh!!
Plagg: Oh dear, that's no- *gets the corruption also* Agh!!
(After a couple of hours, all of Marinette and Adrien's friends supress the corruption from them while vanishing back into Cyberspace)
Marinette: That's better.
Adrien: Yeah. But I can't believe that The End is still alive!
Mayor Bourgeois: This is very bad! What are we going to do?!
Gabriel: We've got to get to Ouranos Island, now!
Audrey: But, how?! That island is far across the ocean! We'll never make it in time!
Amelie: Audrey's right. How can we get to the island quickly?
Tomoe: There is a solution... Follow me.
-Later; in Tsurugi's Lab-
Emilie: What is that?
Tomoe: This is a Purple Portal. Felix and I built this for easy access to travel to the Starfall Islands and back. However, this is the only one that works so far. The others are still in production.
Cat Noir: It should work like the Cyberspace Portals, right?
Tomoe: We've made multiple tests, and they work perfectly well.
Mayor Bourgeois: Good. Now, get going! I'll stay here while all of you go on.
Amelie: Alright. Let's go!
Sage: We must go, now!
Ladybug: Let's go, guys!
(Using the Purple Portal, Ladybug, Cat Noir, Gabriel, Emilie, Amelie, Sage, and Tomoe all warp to Ouranos Island......)