If (Mata Aetara)

"If -Mata Aetara-" (If ～また逢えたら～) is a song recorded by South Korean band Day6. The song was released as the group's first Japanese CD single on March 14, 2018, by Warner Music Japan. Ahead of its release, the song was pre-released as a digital single on February 26, 2018. "If -Mata Aetara-" serves as the theme song for the Japanese television drama, Repeat (Unmei wo Kaeru 10 Kagetsu).

Composition
The song is in the key of E Major and is 184 beats per minute.

Certification and sales
! scope="row"| Japan (RIAJ)
 * None
 * 4,832 (physical sales)
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