Hirao was born in Matsudo on December 31, 1996. She joined Nadeshiko League club Urawa Reds from JFA Academy Fukushima in 2014. She played many matches as regular goalkeeper and the club won the champions in first season. However her opportunity to play decreased behind Sakiko Ikeda from 2015 season. In 2018, she moved to Albirex Niigata.