The film is based on a novel of the same name by Kim Ha-in, and stars Jang Jin-young and Park Hae-il in the lead roles.

[1] University student Seo In-ha meets a young woman on the subway and instantly falls in love.

Although he makes a poor first impression, In-ha and Hee-jae eventually become friends, though he is left disappointed when she later rejects him, as she is more interested in another student, Kang Seong-ho.

While Hee-jae and Seong-ho prepare to get married, In-ha, now a producer at a local radio station, still pines after his first love.

After a while he resumes his pursuit of her by reading out letters on his radio show, and finally winning her heart, the couple get married.