Princess Luna asks Blazin' to hang out with her for a whole day since Celestia has a lot of time on her hooves.
Ok, so Blazin' wakes up to see Sapphire walking around, not with him this time. He bounds out of bed zooming out the house to catch up with her.
Blazin': Hey, where are you going?
Sapphire: I'm taking the time to make some friends on my own. You showed me how, and I have to thank you for that. I don't need your help now. I can do it.
Blazin': But who am I supposed to spend a whole day with? I love you!
Sapphire: I know. I love you too. I'm sure you'll find someone. Have fun!
Blazin: OK, catch you later! *goes home*
He is now sitting in a chair next to the front window. After an hour, he falls asleep....
Princess Luna is also bored. She asked her sister Celestia to play with her, only to get the response, "Not now, I've got a lot of things to do, and I mean it".
Celestia: Maybe it's time you went out to find other ponies who are willing to hang out with you. Blazin' seems bored. Sapphire is away looking to make new friends like her taught her. He could use a cute friend!
Luna: Which is why I have more friends than you.
Celestia: Just get down there! I got 100 unread letters to read!
Princess Luna makes her way to Blazin's house, knowing he wants to hang with her for a whole day.
Luna: *knocks on door* Blazin', you here?
Blazin': *wakes up and falls out the chair* I'm coming! *opens the door*
Luna: *looks at Blazin' passionately, blushing* I was wondering, if, you know, wanted to, I don't know....hang out?
Blazin': *blushes* Your'e so cute....OK! let's go!
Luna: *winces* I think those desserts are catching up to me. My belly's a little sore, so....Belly rubs, please?
Blazin': Yes, Your Highness! *rubs Luna's belly*
Luna: That feels so much better!
Rainbow Dash walks by and sees Blazin' rubbing Luna's belly.
Rainbow: That is SO cute! I'm gonna take a picture! *flashes camera*
Luna: *looks at Rainbow* Hey! Don't get any ideas! He's just making me feel better!
Blazin': You lie and say that I was trying to to be more than her friend, when I was just being helpful, and I'll show Soarin' your baby pictures!
Rainbow: *blushes* No! You wouldn't!
Luna: Trust me, he would. You better say he was helping to soothe my upset stomach!
Rainbow: O-OK. *takes off*
The two friends go for a walk around town, saying hi to everyone.
AJ: What's with the two of ya walkin' together around town? Are ya makin' him one of your Royal Guards?
Luna: Nah, just doing friend stuff until Sapphire comes back from making friends. Where to next?
Blazin': You can choose, Your Highness.
Luna: How about we share a cake at Sugarcube Corner? Or get some cool outfits at Carousel Boutique? Or make cider at Sweet Apple Acres?
Blazin': How about we do all three?
Luna: Nice choice! Let's go! *puts Blazin' on her back and flies to the first stop*
Blazin': Hey, there! Me and my friend Princess Luna are having an awesome day together!
Mrs. Cake: What can I do for you toda-*gets interrupted by Pinkie Pie*
Pinkie: NO WAY!! That's great that you two are getting to know each other more!
Lyra walks in unannounced, looking at the two friends.
Everyone looks at Lyra, confused.
Lyra: What? Was it something I did?
Blazin': What in the world are you wearing? If you wanted to go swimming, you could've just waited until you were there. You didn't have to show up in your bathing suit! What brings you here?
Lyra: I was cleaning my room, as well as every other part of my house, and I stumbled across this. *pulls out her birth certificate*
Luna: Well, they are important...
Lyra: I looked at it, and underneath "Siblings", it said, "Blazin' Blue-older brother"!
Lyra: It's true. He is, and now, I found you! HUG ME, BROTHER!!
Blazin': OK, little sis....*hugs Lyra*
Luna: This has GOT to be the top topic in the newspaper! *pulls out a camera and takes a picture of Blazin' and Lyra together*
Blazin' What about the cake we were going to share?
Luna: Silly me, I forgot. All righty! Is your baker ready, Mrs. Cake?
Mrs. Cake: She is, aren't you, Pinkie?
Pinkie: You name it, I'll bake it!
Blazin': Get her, Luna!
Luna: It shall be a two-layer cake with strawberry frosting AND filling, topped with strawberries. THE LAYERS HAVE BEEN DOUBLED!! Did she get that?
Mrs. Cake: Did you get it, Pinkie?
Pinkie: Yes, Ma'm! *rushes to get the ingredients to make the cake*
Luna: Take it easy. You aren't being timed.
The cake is made in five minutes. While waiting for it to cool, Blazin' searches for a table and two seats.
Pinkie: Don't worry, we'll find a perfect spot. Ah, right near the front, where you two can watch passersby.
Luna: Thanks! Allow me to give you the bits to pay for it.
Blazin': Allow me. How much was it?
Pinkie: Twelve bits.
Blazin': Here you go!
Pinkie: Holy cow! I didn't think....
Blazin': That I would be able to afford it? I work at Carousel Boutique, silly! Rarity pays well, but I'm not all about money. I work to help her out.
Pinkie: I din't expect you to get a job THAT fast! A lot about you has changed...
Blazin' and Luna sit down to eat the cake together!
Luna: I know you love strawberries, so I made sure the cake was something you and I can both enjoy!
Celestia, finished with the pile of letters, goes down to find Luna, and smells two-layered strawberry cake with strawberry frosting and filling topped with strawberries.....
Celestia: Somepony's a strawberry fanatic...It's coming from Sugarcube Corner. Where is she...Aha!!
Luna: *looks to her left* Shoot, Tia! Can't I eat with a friend in peace?
Celestia: Nice-looking cake! I didn't know Blazin' likes strawberries!
Luna: What else don't you know?
Celestia: *licking her lips* Can I...
Luna: NO!! Our cake!! Doesn't feel good, does it??
Celestia: C'mon, sis, time to go home. Say bye to your friend!
Luna: Bye, Blazin'! The cake was delicious! Thanks for buying it! I had an awesome time with you today!
Lyra: *back with bathing suit in saddle bag* Better?
Blazin': Yes, now allow me to get mine ready! *leaves and comes back with his swim trunks along with other essentials in his saddle bag* OK, let's go-sis!
Lyra: Right behind you-brother!
They swim together for an hour, then go home.
Sapphire returns, with BonBon and and Derpy Hooves as her new friends.
Blazin': I knew you could do it. Good choice of friends. Now, if you'll excuse us, we have to get home. Thanks for becoming my girlfriend's friends!
BonBon and Derpy: No problem, bye!
So they both return home to talk about how awesome their day was. Blazin' tells her that Lyra is his sister, and she is very surprised.
Sapphire: Shouldn't you change your last name?
Blazin': Nah, we still know each other as brother and sister.
Lyra shows up wearing her bathing suit, right when she learns Blazin' is her older brother....