Rain Shower, also called Shower in English, 0r Sonagi (in Romanized Korean), is a short story written by Hwang Sun-won in 1959 (Hwang also wrote the seminal novel The Descendants of Cain – a horrific story of greed and betrayal). Sonagi is a brief but a heavy rain shower that suddenly comes down usually on a hot afternoon. In Hwang’s story, the rain shower both causes and symbolizes the short and tragic love of the boy and the girl.
Included in a couple of anthologies, so don’t fret if you can’t track down this version.