Set in the seventies and the present day, it tells a love story over two generations, with Jang Keun-suk and Im Yoon-ah playing dual roles.

It's love at first sight when Seo In-ha (Jang Keun-suk) and Kim Yoon-hee (Im Yoon-ah) meet as shy university students in the seventies.

[6][7] In-ha's son Seo Joon (Jang Keun-suk) is a photographer, and he bumps into Yoon-hee's daughter Jung Ha-na (Im Yoon-ah) by chance.

[8][9] Unaware that their children are dating each other, Seo In-ha (Jung Jin-young) and Kim Yoon-hee (Lee Mi-sook) announce that they are getting married, which will make Joon and Ha-na step-siblings.

[10][11] Love Rain reunited director Yoon Seok-ho and screenwriter Oh Soo-yeon; they previously worked together on Autumn in My Heart and Winter Sonata a decade before.

[18] The drama was featured at the MIPTV, an international event for marketing and purchasing entertainment content held in Cannes, France in April 2012.

Love Rain also featured non-Korean background music, such as "Verden Vil Bedras" by Sigvart Dagsland in episode 6, and "(Where Do I Begin?)

[26] It has since been exported to 12 countries in Asia and Europe, including China, Hong Kong, Taiwan, Thailand, Malaysia, Vietnam, Philippines, Cambodia, and Singapore, recording around ₩115 billion in overseas sales.