Guys... what the HELL is going on here
My speculation is something like this:
Inferno of Jealousy.
In Chapter 4, when arriving at Noelle's house, Noelle gets surprised upon finding out that Kris & Susie went to the diner together if that was done.
You can do that on the Weird Route.
On WR, in the hospital scene, Noelle uses FireShock on the IceDrake because she's more assertive.
But Noelle seems to be an ice-themed monster.
From what we've seen, Susie doesn't know what's going on with Noelle in the WR. There's no ferris wheel scene, she goes home early, they don't have time alone in Noelle's house, & Noelle is... not in her right mind.
So what if the plan is to get Noelle at the lake, then somehow get her... burned?
Break Noelle, so that she no longer seeks Susie. Then, destroy the ice monster with fire. Susie is now all alone.
Various responses to answers like "Festival" imply that however much the user may want it, it's wrong, can't/won't happen; Kris & Noelle won't/don't get together. (Or the story is broken by it being happening.)
That's why it says:
"You only need to see her once.
And you'll move on."
(Plus, arguably, the tone of the answers matches with the Shadow Mantle Holder so far, which would support a fire connection, plus the lighting. Look at the shadows, & how Kris's face is shadowed; Such a visual on the face is often used for when a character is emotionally unwilling to show their face.)
When is the last time you need to see someone?
What kind of meeting with such a person is also one you'll then need to "move on" from?
Perhaps because there's no going back?
Susie will be none the wiser; A fire in a forest at a festival? Where discarded cigarettes can be found? An accident. Surely.