It is the year 2038, and the Earth is slowly being consumed by a space-borne monstrosity dubbed the Black Tide, which is using nanotechnology to remake the planet into something hideously alien.

Erin Olsen works for Project Harmonics, humanity's last-ditch effort to find a new world before the Tide can wipe them out. But when that world is found, and it turns out to be occupied, Erin will need to find the courage to face the unknown in order to save the inhabitants of both worlds.

(Many thanks to Easteu for the fantastic cover image for this story!)

Now with its own TV Tropes page

There is now a follow-up to this story: Sunflower - Side Projects
Sequel: Project Sunflower: Harmony

Have you ever just been having a regular day, then suddenly, BAM, you're dead? Well, no, of course you haven't. But what do you expect to happen after you die? If the answer was getting shoved into an overly pink copy of a pony princess, you'd be lying. Worse yet, she made me an alicorn just like her, which causes a whole new set of problems.

Unfortunately, she was adamant that I stay and become her twin sister. I ditched her immediately in my bumbling confusion and fear, and who could blame me? The last thing on my mind was being here! Ponies, princesses, and twin sisters? What kind of fantasy story was that? I was on the run, hiding from guard patrols, and fighting for my next meal. However, my own hubris caught up to me in the end, and her super powerful mother, Cadance, found me and made me see how stupid I was being. And Cadance, is an absolutely crazy powerful pony, with an even more powerful maternal instinct. So when it came down to her word against mine, she was really hard to convince, and she wasn't taking no for an answer.

(AKA, Super wholesome, fluffy, found family. And me having fun tugging on heartstrings.)
(Cover image by: me)