G7 members:

You as Son Hana

14 years old(Start)
The sub vocal of G7
You have a really cute face and a really cute high pitched voice that makes you sound like a little child
Because of your voice you sound like you're having a lot of aegyo which is actually not true
You likes to play video games and read manga books in free time.
Maybe it's because you grew up with guys, but you actually don't really care about it
You are a bit shy around strangers, but can be really playfull when you start to get close with someone.
You can play the piano, keyboard, drum, guitar, bass, flute, clarinet, violin and the cello.
You speak fluent English, Chinese, Japanese and Korean and are learning French, germans and Thais.
You have 2 sisters and one younger sister

Kim Minyoung

18 years old(Start)
The leader and main vocal of G7
She's has a bit shy personality, but has a strong vocal voice
Even thought she may not be the most suitable choice as leader because of her shy personality
She's the most caring one in the team
She and Jieun are best friends from each other

Lee Jieun

17 years old(Start)
The lead vocal and main dancer of G7
She's famous between the trainees as the Yoona look a like
She's also an ulzzang on the internet
Not only so, she can sing, dance and has act in severel dramas before.
She can act a bit bossy and arrogant sometimes, but she's actually kind in her own way
Kim Minyoung's best friend

Lee Angel

16 years old(Start)
The lead dancer of G7
She's your roommate and she's half Chinese and half Korean.
She's really strict for herself while training, because she thinks she need it to debut
She plays the piano and the violin
She's the first one who you got close with

Tanaka Yumi

16 years old
One of the few Japanese trainees in SM entertainment
She likes weird cute puff things, and doesn't really talk to strangers
She's the Sub-vocalist and main dancer

Jung Mia

15 years old
The rapper of G7
She gives normally a bit tomboyish feel to others when she talks even with her cute face
But she's actually a really femine girl

Lee Minji

13 years old(Start)
The maknae and sub-vocalist of G7
She's really cute and has a lot of aegyo
She always try on her hardest while training and could be too serious sometimes
Likes to cook small things.

Family:
Son Mina

24 years old(Start)
She debuted at the age of 5 as an actress and debuted as a singer when she was 15 in China
She plays 12 different instruments and speak 10 different languages
Because of her work you never met her in person before your became 7
She's a really kind and nice girl and your role model

Son Naeun

15 years old(Start)
She became a trainee in Korean 1 year before you
You two always argument with each other, but make up with each other really fast

Son Nana

12 years old(Start)
A piano genius
She already attended big competitions at the age of 8 and has already won quit big prizes
Even so her dream is become a singer, but everyone is against it even you
The reason is because you know how hard it is to be a singer and you want her just to focus on her piano

friends and sunbae's:

Zhang Yixing

18 years old (start)
Your first friend in SM
He's always friendly and take care of you really well

Lee Taemin

16 years old (Start)
The maknae of Shinee
You bumped into him in the canteen on your first day
You think's he's too pretty to be a man

Yamada Ryosuke

16 years old (Start)
Your idol and one of the reasons why you came to Japan
He became your first love on the end and dated for almost a year.
The two of you broke up 2 mothes before you left for Korea

Henry Lau

20 years old (Start)
Your violin teacher in SM
You were a huge fan of Super Junior(M)
so you could almost jump from happiness when you found out that he was your teacher

More will follow with the storyline