Luna and Sunset talk on the roof of Canterlot High School.
Sunset has no desire to kill herself; what concerns Luna is that that isn't the same as wanting to be alive. In fact, it's not even close.
Note about the content:
The "Suicide / Self Harm" tag is only for stories that actually contain those things. There's no warning tag (or any kind of tag) for stories that contain discussion of those things, or related things, without actually featuring them. So I'm warning you here.
This is about a specific kind of deep depression: the kind where you don't particularly want to live. At one point Sunset talks about possible ways she could die, and how none of them would bother her. So if you're not up for reading things suicide related and suicide adjacent, steer clear.
Now that I've spoiled almost every aspect of the story, let me ruin the rest. I didn't tag this as "Sad" because I don't think it's sad. It's definitely heavy, but that's not the same thing.
You might disagree about whether it's sad, though, so take that into account when deciding whether or not you want to read it. If you do read, and you think it should be tagged as "Sad", please tell me in the comments. (The last thing I want to do is bring people down when they're not prepared for it.)