He has held onto a childhood promise for more than ten years: if neither of them married by thirty, they would marry each other. When he returns to his hometown, he discovers his childhood friend is already a married mother. He tries to bury the past and leave, but she stops him with a lonely smile and asks for just one kiss, saying she had waited for him. Years of suppressed feelings erupt, the kiss goes too far to stop, and they devour each other in passionate sex they intend to share only once—their first and last time.