You & I (IU song)

"You & I" (Korean: 너랑 나; RR: Neorang Na) is a song recorded in Korean and Japanese by South Korean singer IU from her second Korean-language studio album Last Fantasy (2011). The Korean version was released on November 29, 2011 through LOEN Entertainment, and was written and produced by Kim Eana and Lee Min-soo, respectively. The song was a huge domestic success, achieving the top spot on the Gaon Digital Chart and went on to sell more 7,000,000 digital units by 2021. According to Gaon, "You & I" is the second best-selling single in South Korea since 2010, ranking only behind Busker Busker's "Cherry Blossom Ending" (2012).

In Japan, "You & I" was released as a standalone single through EMI Music Japan on July 18, 2012, serving as her second single in the country. It was physically distributed in three formats: a standard CD and two CD + DVD limited edition bundles. Commercially, "You & I" performed rather moderately in Japan compared to its performance in the singer's native country, where it peaked at number five on the Oricon Singles Chart and number eleven on the Billboard Japan Hot 100, selling 18,000 copies.