Yu Na bi, a 23 years old girl, got frustrated from her life and then found a guy named Song Kang, who was a handsome man of 24 years. He loved butterflies... I think u can understand what I mean😀 they found each other very interesting and stated to fuck each other for quenching their thrust, they don't love each other... what will happen next???will they fall in love or remain in the same path??