Now that v13's newest story gives quite an Undertale vibe and the previous one had some changes here and there, I'm starting to think of a Rejuv story but with Frisk, Undertale's MC, as the Interceptor. One of the storyline changes in v13 is how the bad future arc's climax choices are handled, so I might as well make a one-shot of how it goes with Frisk.
For the record, Frisk is a non-binary in a male body (I'm going for Axel's) with they/them pronouns here. And before I forgot, Undertale spoiler alert. Read at your own risk.
Sorry for the shortness though. I did it on my phone and that's all I can think of for now.