The past shouldnt hurt the future

Killua and Gon

Killua is a 12 year old boy who goes to toujo middle school. He is in seventh grade living by himself in an old run down house because he had to get away from his family. He eventually becomes great friends with a boy named Gon. Though killua's family and his home situation are kept a secret. But Killua has had A severe case of Athsma since infancy and tries to hide it. or will everything unravel before his eyes?