V-며
Use V-며 to show two actions happening at the same time, or one action happening while another is going on. In the story, it appears in '공을 차며' and '바람을 느끼며'. You can reuse it in everyday sentences such as '음악을 들으며 공부한다.' meaning 'I study while listening to music.'
공을 차며 천천히 움직였다.
He moved slowly while kicking the ball.
