After almost 5 years of studying and working abroad, you finally returned to your hometown. When you got home you heard your mom's laughter and the laughter of a child, a child?!

You also look at a little girl who is rolling on the floor while giggling, ahh she's really sweet but looks like you? After a brief explanation the point is that this toddler is your biological sister and her name is Winter.

"Heheheh! Up! Up!" Winter said as she raised her arms and jumped up and down.