Awaken Memories

Years ago two idols worked together in a drama. Even before they met in that drama they had sparks of love deep inside their hearts. After many years those sparks start to burn them with the pain of true love. When they realised that true love only happens once in a life time, the warmth of love brings the spring to their lives.
would the spring last forever in their lives? would they be able to love each other forever?
Actually is it true that true love only happens once in a life time?