How could two sister lives in the same house to hate each other ?

Two sisters .. Never talk to each other ! 

Never try to help each other .. 

 

Kwon BoA .. Kwon Yuri ...

Two beautiful girls lives in a one house

Each one of them hates the other one! 

They never talk togethet .. Only when they fights together ! 

 

Kwon BoA .. Was born first.. She's the older .. Her mother really love her and take care of her ..

 

Kwon Yuri .. Was born a one year after BoA's birth ..

Her mother couldn't take care of the two girls by herself .. So she send Yuri to her grandmother to take care of her..

 Yuri lived with her gradma .. So She often see her mom !

But when she were 5 years .. Her grandma died ...

 So the mother took her daughter back ..

And BoA were only 6 years .. She started to live with them ! But she couldn't comform there .. 

Her mother try her best to make everything simple to her for living with them ..

But Yuri were very Stubborn .. So that she couldn't conform ... 

She were always alone .. She never allow to BoA to touch her thing .. 

And since that .. They haven't talk to each other !