if I jump over there

I love a short novel in Japanese text of junior high school named "sokomade-tobetara (if I jump over there) written by Mikie Andou.

Heroine in this story is a junior high school student. One day, she is informed that her grandfather is in critical condition. She and her family go to hospital.

When she meet her grandfather, she remind that her grandfather give a new shoes to use  long jump. Her parents saids "It is good to use shoes that you usually use." But she want lighter shoes. And, her grandfather hand a new shoes and says,
"Do things that you think good. And this is the best your charm."

In first hours of morning, she think "If I jump over there, and he clears up." at garden of hospital.
She runs, and drifts on the air.

After that, she talks her grandfather who escapes death.
"I decide, grandpa. I will enter the track and field club."