Or haned at a very young age, Gui, a fourth-year engineering student, has had to work hard and earn for himself for as long as he can remember. Still, through the test of time, he still has a soft demeanor and a smile on his face. Solo, a freshman in the Faculty of Music, can get anything he wants with a flick of his wrist. Money, fame, good looks, the boy has everything, exce t his smile. When Solo's mother assed away, she took with him his smile. Nothing could fill this missing hole in him... that is — until one day when he sees a smiling boy working at a cafe. One night the two worlds collide in a small coffee sho . For a cu of hot milk and a warm smile, Solo finds himself back in the cafe every night. For a soft boy who reminds him of a husky, Gui finds himself waiting for a late-night visitor with a cu of hot milk, night after night. Night after night, the two boys continue to meet. At the same s ot, at the same time, until they soon come to realize that they have become each other's breath. A necessity. Just like Oxygen