Short #1: The 4 Royal Pony Sisters Part 2

This comic proves that all OCs that are in my shorts/side stories are going to have important roles as well as frequently appear once in a while. If the owner of the OCs I've used or going to use wouldn't like this, then post a comment on my profile page. Now for those who couldn't read Gamma's speech bubbles, this is what he said:
First Panel: "But the princesses need to hear it too"
Last Panel: "I'm not the one to rush, but Sunset's right. We're running out of time and you have to get back by sundown"
Profile Page: EmoshyVinyl

So what was Moonstone trying to say, and what will these ponies do once they get back to the library?
First/Previous: The 4 Royal Pony Sisters Part 1
Next: The 4 Royal Pony Sisters Part 3

The OC, Gamma belongs to mlprsocs
The OC, Moonstone belongs to Cutie-PonyArtist
Backgrounds:
Library background belongs to Spyro4287
1st Ponyville background belongs to light4lls
2nd Ponyville background belongs to Dipi11

Applejack Vector belongs to Shelmo69
Bonbon and Lyra Vector belongs to xkappax
1st Carrot Top Vector belongs to DrFatalChunk
2nd Carrot Top Vector belongs to 90Sigma
Dinky Vector belongs to Durpy
Derpy Vector belongs to 90Sigma
Poster Vector belongs to BraveryTheHusky