Let's just say that Nana knows that her oppa is in a gang along with his friends.

You woke up and look at the time. It was 6 in the morning so you decided to cook for your brother so you head to the kitchen wearing shorts and an over size t shirt. You cooked bacon, eggs, toast, and pancakes. You set the table and went to your brothers room. 

"Wakie Wakie oppa!! School time!" He's still not waking. So you decided to push him off bed. When you finished pushing off bed he stood up. 

"Yah! Why'd you do that!" Myungsoo oppa said. 

"You wouldn't wake up. I also made breakfast so get ready." You said and left his room. 

Myungsoo oppa went to take a shower and wore his uniform. He went downstairs and find you eating breakfast. 

L's POV

"Good morning Nana-ah!" You greeted your sister. 

"Morning! Oppa!" She greeted back. 

"So I'm gonna register you to my school SM high. SM high is like a performing arts types of school, but Sm high has three gangs. The gang called Infinite that's my gang. And there's two more. One is called Bap and one is called Bigbang!" You said. 

She chocked at her water. 

Nana's POV

I chocked when I heard Bigbang.

"Nana-ah! Gwenchana?" Oppa asked. 

"I'm fine! But did you just say Big Bang as in Big Bang the #1 gang in Seoul?" You asked. (let's just say gang world is Seoul.)

"Yeah! Why? Are you scared of them?" Your oppa asked. 

"No! I'm not scared of them. They're actually quite funny when you get to know them." You said but muttered the last sentence. 

"Really? Your not scared of them?" Your oppa asked again. 

"Yes oppa! I'm not cared of them. But oppa wanna know something?" You said. 

"Yeah! What is it?" Oppa asked. 

"Me and the leader of Bigbang are BESTFRIEND including s.