This is the chapter were Star tells Marco that (Y/N) is her sister. Then (Y/N) leaves Mewni and arrives on Earth.

Normal POV

It was afternoon, and Star was in her room talking to you. Marco was observing Star from the door.

"(Y/N)! I am so excited, I just can't believe you're coming to live with me!" "But are you sure it'll be okay" Star then smiled "Of course, the Diaz Family is so friendly and I'm sure they won't mind you staying, especially Marco"

Wait, (Y/N) is moving in with us, what does Star think she is my house manager, Marco thought.

"Star, I think you might want to tell Marco and his parents" Star then glanced around her room to see if anyone was there, "I can't! Marco might not approve with the idea of you moving in". You giggled "Just tell them that someone is coming over."

Star sighs "Alright,, I'll give them a heads up" "Good, now I'll see you tonight" You waved at Star and ended the call. Star then walked out of the door and yelled out "MARCO!!"

"AHHHH, STAR WHY DID YOU DO THAT FOR!" Marco checked his ears to make sure he wasn't deaf. "Were you spying on me, again?!" Star raised her eyebrow.

Marco laughs nervously "Uh...I...maybe" "What exactly did you hear then" Star had her hands crossed waiting for an answer. Marco sighed "All I know is that someone is coming over to live with us." Star then faced the floor "I'm sorry I didn't tell you Marco."

"It's alright Star, but is she going to stay" Star went and sat on her bed "Yeah, she is, is it alright if she could stay." Star then made sad puppy eyes. "Fine she could move in" Star jumped out of her bed and hugged Marco. "Thanks Marco!"

"So when is she coming" Star laughed nervously "Um, tonight." Marco's eye widened "TONIGHT!"

(Y/N)'s POV

I used my (F/C) wand to pack clothes inside my (2F/C) briefcase. "It's been 2 years since I last seen Star, and tonight I get to finally met her." I rushed to meet my parents, who were waiting for me already.

"Hi Mom, Hi Dad" Your father, River, smiled and hugged you, almost crying "I can't believe my beautiful angel is leaving tonight." Your mother, Moon, smiled at you "This is going to be a big change for you (Y/N), remember we love both you and your sister, take good care." You hugged your mother "I will. I love you mother and father." As you were about to leave Moon grabbed your hand "Wait just a moment dear." You were confused at first "Yes mother."

Moon then took out a (F/C) dimensional scissor "You can't go anywhere without a dimensional scissor". (Y/N) gasped in excitement "Y-You're giving me my own dimensional scissor." Moon smiled while handing the dimensional scissor to (Y/N) "Since you moving to Earth, I decided to give you your own." "Thank you Mom" River hugged you one last time "Goodbye my beautiful butterfly." You hugged back, but this time Moon decided to join the family hug. You felt excited that you were going to live with Star, but you also felt disappointed because you were going to miss your parents, who always loved you.

"Bye Mom and Dad, I'll miss you" You smiled and waved goodbye. Moon and River both waved and smiled as well (not because they wanted you gone, but because they wanted you to be happy and discover things on your own). "Goodbye, (Y/N)." (Y/N) opened the portal to Earth and walked inside.

Star's POV

I can't wait for (Y/N) to arrive, this is going to be amazing. I was going to brush my hair again until I noticed Marco walk in. "Hey Star, want to hear the good news" Marco was smiling, almost as if he had something planned.

I was confused as I looked at him, because I wasn't sure if their was any news at all. "Is their good news." "Of course. I told my parents that your friend was coming to live with us and they allowed it." I was so excited, but then I corrected him "Marco, (Y/N) is my sister."

Marco was shocked when I said that "(Y/N) IS YOUR SISTER!" He then fell backwards, but before he could hit the floor (Y/N) was their to catch him. I screamed in excitement and ran over to hug her. "I CAN'T BELIEVE IT YOU'RE HERE!" "N-ice to m-meet you S-Star." I stopped hugging her because I knew my hug was crushing her. "Sorry, I just got really excited." (Y/N) placed Marco on my bed after I hugged her. "Its alright Star, I'm also excited to finally be with you again" (Y/N) and Star hugged each other again.

Marco's POV

I got up and looked at (Y/N). "I-Is this your twin sister Star." (Y/N) giggled "I am but we're not identical twins, we are fraternal twins." Wow, she's beautiful, her giggle is adorable. Star then walked in front of me "Marco meet (Y/N), (Y/N) meet Marco!"

"Nice to meet you Marco" (Y/N) put out her hand. I did the same and shaked her hand "N-Nice to meet you, (Y/N)" I noticed that I was shaking her hand for more than a while, I quickly stopped and rubbed the back of my head. "Sorry about that." "It's okay, I like your smile" she said. Hearing this I began to blush that even (Y/N) noticed. "Looks like you two are already friends" Star then hugged both of us together.

(Y/N)'s POV

This place is amazing I'm back with my sister and I met this adorable boy named Marco. I wonder what else their is for me to discover.

A/N~ Sorry for this, but there is more chapters to come. I will try to upload more as soon as possible, so please forgive me if I can't upload more chapters on time. Anyways thank you all and Bu-Bye. ❤