Spring of a Twenty Year Old (Hangul: 스무 살의 봄; RR: Seumusal-ui Bom) is the fifth Korean-language extended play (sixth overall) by South Korean singer-songwriter and actress IU. It was released and distributed by LOEN Entertainment on May 11, 2012. The CD, which was also released digitally, consists of three tracks in total, one of which was composed by IU. It is the singer's first Korean-language release since the full-length album, Last Fantasy, that was released six months prior.

The EP spawned two hit singles, "Peach" and "Every End of the Day". The latter topped Billboard Korea K-Pop Hot 100 for four consecutive weeks, making it IU's second number-one hit on the chart after "You and I". The EP has sold over 34,400 copies in South Korea as of 2013.

On May 1, 2012, IU posted a hand-drawn picture of a peach to her official Twitter account, which she described as "racy". Not known to fans at that time, this was actually the first information regarding IU's upcoming Spring of a Twenty Year Old album. A video teaser for the song "Peach" (Hangul: 복숭아; RR: Boksung-a) was revealed the following day. The teaser ended with another hand-drawn image of a peach. Later, on the May 22 episode of SBS's Strong Heart, IU revealed that her label had requested for her to draw an image for the "Peach" teaser. She decided to draw a peach which also resembled a heart, however, her initial attempt, the "racy" peach, was rejected as it was "too risque".

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