We start in the evening, on the Eiffel Tower. Ladybug and Chat Noir stands in front Mega Man and Harp Note as they check their bags.
Mega Man:....and that's everthing. (zips his back).
Harp Note: (zips her bag) We'rr missing nothing. Now, about the living situation.
Chat Noir: Don't worry, i got a place in mind. But one small problem.
Mega Man: What would that be?
Chat Noir: I can only take one of you...and that would be Geo.
Harp Note: Then what about me?
Ladybug: I have a place for you. It'll be complicated, but you'll manage.
Chat Noir: Then, it's settle. C'mon Geo, while i still got time.
Mege Man: What is it, Ladybug?
Ladybug: This is important, so remember it.
Harp Note: So, tell us.
Ladybug: Keep our identities a secret.
Mega Man: What?
Ladybug: Whenever your with us, you may find out who we are. So whatever you do, don't tell either one of us our identities...no matter how much we beg (looks at Chat Noir).
Chat Noir: (sighs)...another disappointing lost. Oh well, let's go Geo.
Chat Noir grabs Mega Man's gym bag and sling bag as He takes his suit case under his arm. The two then jump off the Eiffel tower.
Ladybug: The boys are going, we might as well too.
Harp Note: So...where are we going?
Ladybug: My place of course. Trust me, you'll love it there.
Ladybug grabs Harp Note's backpack and gym bag as she takes her suitcase under her arm. Ladybug throws her Yo-Yo and swings off the Eiffel Tower as Harp Note jumps off.
A few minutes later, outside the Agreste Mansion.
Mega Man and Chat Noir has just landed in a corner at the side of the wall. Mega Man then de-transforms into Geo.
Geo: (looks at the mansion) Woah...is this your place?
Chat Noir: Yeah...now listen: i have an idea, but you gotta follow along, okay?
Geo: Yeah, so what's the plan.
Chat Noir: Your my pen pal who came from New York, in the US for a surprise visit. I'm gonna convince my dad to let you stay for a while before going back. You catch all that?
Geo: I...i think so.
Omega-Xis: Don't worry, i'll remember for him.
Geo: Make to whisper, Omega-Xis, we don't want to cause any trouble.
Chat Noir: Wait about 3 minutes, then go to the gate and activate the intercom.
Geo: Wait, i have to ask you something.
Chat Noir: What is it?
Geo: What's your name?
Chat Noir: It's Adrien...Adrien Agreste.
Chat Noir extends his staff as he vaults himself over the. He lands on the mansion grounds before running to in front of his bedroom window. He then jumps, grabbing onto the ledge as he pulls up inside.
Chat Noir: Now for the hard part.
Chat Noir de-transforms into Adrien as Plagg flies, then crashes on the couch.
Plagg: Man, i'm tired.
Adrien: Grab yourslef some camembert, Plagg. I'll be back in a few.
Adrien walks over to the door and opens it. He then walks into the foyer and goes down the stairs. Then the door to the Atelier opens as Gabriel comes in.
Gabriel: Adiren, Nathalie said you wanted to talk to me.
Adrien: Yeah, dad their's something i've been meaning to tell you, but i guess it's too late.
Gabriel: Too late for what?
Nathalie then walks into the foyer.
Nathalie: Mr. Agreste, their's someone at the gate. A boy named Geo Stelar, he says he knows your son.
Adrien: You see dad, i have a pen pal. I've met him online for a month. And...
Adrien: He surprised by telling me he's coming for a surprise visit.
Gabriel: I see...but why didn't you tell me this before?
Adrien: I wanted to tell you, but you were so busy with work, i didn't get a chance. C'mon dad, he has nowhere to go.
Gabriel:......(sighs)....Very well, but i would like to meet this boy. Nathalie, open the gate.
Nathalie looks at her tablet and pushes a button.
Gabriel: Now, let's see who this Geo Stelar.
A minute later...
They all look at the door as Geo comes in with his bags.
Gabriel: So...(looks at him)...your Geo Stelar, my son's pen pal?
Geo: Yes, sir, i am.
Gabriel: And where did you come from?
Geo: New...New York, sir.
Gabriel: I see....(faces Adrien)...Adrien, i think he should go back.
Adrien: What? Why?
Gabriel: While he is young, he looks troublesome and i can't have anyone like that in my home. I'm sorry Adrien, but he cannot stay.
Geo: C'mon, i have nowhere else to go. Just give me a chance, evenn if it's for one night.
Gabriel: Watch your mouth, boy. Did your father ever teach how to behave?
Geo then looks sad as he looks away.
Adrien: Geo, is something wrong?
Geo: Yeah, there is but...
Gabriel: Then out with it.
Geo: My dad...he's...he's been gone for a few years.
Geo: He was missing ever since a accident while he was working.
Gabriel: (looks down for a bit, then turns towards the Atelier) Adrien...he can stay during his visit. However, i expect him to follow the rules and not to disturb your lessons or my work.
Adrien: Okay, thanks dad. C'mon Geo, let's go.
Adrien grabs his suitcase and carries it up the stairs, with Geo behind him (carrying his sling bag and gym bag).
Nathalie: Sir, are you sure about this?
Gabriel: I do not know. I'll be checking on them later. Speaking of which, did you finish checking the reports?
Nathalie: Yes, sir, i have them in my tablet.
Gabriel: Good, send them to my computer, i'll read them later. I have a meeting to attend to.
Nathalie: The car is ready, waiting outside for you.
Gabriel: Very good. While i'm gone, i want you to contact the Curator and see if he has made any breakthroughs.
Nathalie: Consider it done.
Gabriel walks to the door, opens it, then leaves. Nathalie then walks to the Atelier.
Meamwhile, in Adrien's room...
Geo: Woah....(looks around)...this is really your room?
Adrien: Yep, pretty cool, right?
Geo: Yeah, but where i'm from, most of this is outdated.
Omega-Xis: You do have to admit Geo, not even Luna would have a lot of stuff in her room.
Adrien: That reminds me: Where are you from?
Geo: That's...gonna be complicated to explain. How about later, for now i'm tired.
Geo walks over to the couch, but just as he is about to lie down...
Plagg: Hey, i eating here!
Geo: What the...
Geo gets back up and turns around, seeing Plagg on the couch, eating a piece of camembert.
Geo: What? What are you?
Omega-Xis: (appears beside Geo) Looks like a cat, but...smaller than usual.
Plagg flies off the couch and hides behind Adrien, then peers from his left shoulder.
Plagg: Adrien, i'm charged! Let's get rid of that thing!
Omega-Xis: I like to see you try.
Adrien: (grabs Plagg) It's alright, Plagg, their cool.
Plagg: "Cool"? Are you sure about this?
Adrien: I trust them, Plagg. Plus, their the reason you and i are still here, so we owe 'em.
Plagg: Alright, but they better not get into my camembert.
Geo: Now i have some questions, but we can ask each other later. So what do you wanna do?
Adrien: How about foosball?
Geo: Sure, i'm game.
Omega-Xis: (yawns) If you two are just gonna be just gonna stick here, then i'm goin' out.
Adrien: Wait! Won't you be seen?
Geo: Actually, no. (puts his right arm in front of him and uses the device on his arm) According to my Hunter-VG, the level of EM waves are lower, exactly like....anyway he shouldn't be spotted by regular people. In fact, i wonder why you can see him.
Adrien: This sounds complicated. Let's just play.
Geo and Adrien walk over to the Foosball table as Omega-Xis disappears and Plagg grabs another piece of camembert
At the same time, at the bakery. Ladybug and Marinette lands at the back door. They de-transform into Marinette and Sonia.
Sonia: (looks at the building) So this is where you live? A bakery?
Marinette: Yeah, it's kinda "sweet".
Sonia then see's Tikki in Marinette's purse.
Sonia: What...what is that?
Marinette: (looks at her purse) Tikki, it's alright, their friends. They helped us.
Lyra then appears in front of them.
Lyra: Yeah, i mean, we did save you.
Tikki: (pops out) Sorry, my name is Tikki.
Sonia: Nice to meet you, Tikki. I'm Sonia.
Lyra: The names Lyra, and we'll be staying with you for a while.
Sonia: Speaking of which, should we go in?
Marinette: In a minute, but first, we need to go over a few things.
Sonia: Sure, what is it?
Marinette: My parents are gonna ask questions, so we need to make up a backstory for you.
Lyra: What do you have i mind?
Marinette: Judging by your look, let's say your from New York, in America. Your my pen pal who came for a surprise visit.
Lyra: I like it, how about you Sonia?
Sonia: I don't know, but it's all we got. But one more thing: What's your name:
Marinette: Marinette Dupain-Cheng
Sonia: Your last name is "Dupain-Cheng"?
Marinette: Yeah, Dupain is my dad's name and Cheng is my mom's name. He's French and she's Chinese. Okay, that's enough, let's go in.
Lyra disappears as Tikkk goes back in the purse. Marinette opens the door and takes the suitcase as they go inside. Marinette then closes the door.
Tom: Marinette? Are you back already?
Marinette: Yeah, dad, i'm back.
Tom walks out of the kitchen and into foyer.
Tom: Oh...i see you brought someone with you. (notices the bags). Marinette, care to explain?
Marinette: Dad, this is my pen pal, Sonia Strumn. She came from New York.
Sonia: Hello, Mr. Dupain, i'm sorry about this surprise visit.
Tom: "Surprise visit"? "Pen pal"? (looks at Marinette) Marinette...
Marinette: Sorry, dad, i've been meaning to tell you and mom, but i was busy with school and you were working bakery. I didn't get the message till before the power went out.
Sonia: I'm sorry, Mr. Dupain, i didn't want things to happen like this.
Tom: (sighs) It's alright. Marinette, you really should tell us things like this. Your mother and i will talk to you later. As for Sonia, she can stay.
Marinette: Thanks, dad (hugging Tom). (lets go) C'mon Sonia.
Marinette takes the suitcase as they go up the stairs, passing Sabine.
Marinette: Hi mom.
Sonia: Hello, Mrs. Cheng.
Sabine: (walking down the stairs) Who was that girl?
Tom: Our guest, Marinette's pen pal.
Sabine: "Pen pal"?
Tom: I'll explain in the kitchen.
Tom and Sabine walks into the kitchen.
Meanwhile, in the apartment.
Marinette opens the door as Sonia walks in.
Sonia: So...(looks around)...this is where you live?
Marinette: (closes the door) Yeah, it's a little small, but i hope it's alright.
Sonia: Oh no, i didn't mean anything like that. I was just a little surprised. It reminds me of Luna's place.
Tikki: (flies out of Marinette's purse and to the stairs) C'mon, you should see what's up here.
Sonia walks up the stairs, pushing the trap door open, and walks into Marinette's room.
Sonia: Wow...(looks around)...nice room.
Marinette: (walking in, dropping the suitcase) Yeah, my parents are nice. But that's not all. C'mon, there's one more thing i gotta show you.
Sonia drops her bags on the chair as Marinette climbs onto the loft and onto the bed. She opens the skylight and climbs up. Sonia follows her up to the balconly as Tikki fly passes her.
Marinette: So what do you think?
Sonia: (looks at the view) I love it. This would be a great place to write songs.
Tikki: "write songs"?
Lyra: You don't know this, but Sonia's a pop star and a idol back home.
Marinette: POP STAR?!?
Lyra: Sorry, just wanted to explain.
Sonia: (sighs)...You were going to find out anyway.
Marinette: No wonder you carry that guitar with you. Where did you get anyway?
Sonia: (takes her guitar into her hands and shows it) It's from my mom. Her last gift to me.
Marinette: Oh....i'm sorry, i...i didn't know.
Sonia: No, it's okay. Now, i know you have questions, but let's talk later.
Marinette: Okay...so, you hungry?
Marinette: C'mon, my their's some cheese cake in the fridge.
Sonia and Marinette go back into the apartment as Tikki flies pass them and closes the skylight.
Memories and experiences will come to light as the heroes learn about each other. Find out what happens in Chapter 6: Brother Band.