Love Rain depicts a 1970s pure love and a love from the present day... at the same time. It shows how the offspring of a previously ill-fated couple, who met in the 1970s, managed to meet and fall in love.
The 1970's story-line follows the popular and musically-gifted art major In-Ha (Jang Geun Suk), who encounters a female student at his university, the beautiful, gentle and soft-spoken Yoon-Hee (Im Yoona), and finds himself enamoured having fallen for her in three seconds. After accidentally finding her diary and being too shy to return it, In-Ha learns more about Yoon-Hee and attempts to further their relationship, falling deeper in love with her. However as Yoon-Hee becomes included in In-Ha's friendship group, which includes fellow university students Dong-Wook, Chang-Mo, Hye-Jung and In-Sook, In-Ha discovers that his best friend Dong-Wook is also in love with Yoon-Hee and wants In-Ha's help in winning her heart. From there, the relationship between the two is pulled into trouble as In-Ha struggles with his loyalty to his friend and his love for Yoon-Hee, while Yoon-Hee struggles with pressure from her peers and Dong-Wook, and her disappointment in In-Ha for not expressing his feelings before she started dating Dong-Wook, whom she is only with in order to please everyone. Despite judgement from friends and the troubles plaguing their situation, the two continue to grow closer - but their relationship is strife with mishaps, misunderstandings and bad luck, ultimately ending in the two going their separate ways.
Many years later in the present day, Yoon-Hee's daughter, the energetic and cheerful Jung Hana (also played by Im Yoona and In-Ha's photographer son Seo Joon (also played by Jang Keun-Suk) meet in Hokkaido, Japan. Despite their relationship starting on rocky ground, the two bickering and disagreeing, fate or coincidence continues to bring the two together. The drama also introduces Dong-Wook's son, Lee Sun Ho and the now middle-aged In-Ha and Yoon-Hee (now played by Jung Jin Young and Lee Min Sook respectively).
Jang Geun Suk as Seo In Ha (70s) / Seo Jun (2012)
Im Yoon Ah as Kim Yoon Hee (70s) / Jung Ha Na