SR (Korean: 첫사랑) is a seven-member girl group under A2Z Entertainment/J Planet Entertainment. The group consists of the following members: Sua, Sihyeon, Yuna, Seoyeon, Duna, Geumhee, and Yeham. They debuted on July 27, 2022, with their first mini-album "Sequence: 7272". Additionally, the group celebrated their Japanese debut on July 4, 2024, with the mini-album "L'heure Bleue".

The concept of the girl group is a "class of young girls born in 2005."