The Armless Twins

I've been making a manga. There's two parts. The Past and the Present. So far there's about 15 charaters, but this story is about the armless twins.
In the Past the armless twins are the youngest. The girl twin, Sakura and the boy twin Sakura were born healthy, and happy. With the love of their Grandpa, nothing made them unhappy. Until the grandpa dies of a stroke. His daughter, their mother, goes insane. Rips all her hair out and attacked the twin. Cutting Sakura's left arm off and Sakurai's right arm.
The father comes home and patch them up. Then leaving them on the streets to feed for themselves.
Who will help the armless twins. How far will Sakurai go for his beloved twin.