OURBIRTHDAY (아워벌스데이, also known as OBD) is a seven-member girl group under INNIT Entertainment, a subsidiary of JYP Entertainment. The group is the first new girl group to debut within the JYP family since NMIXX debuted in 2022. Rather than introducing all seven members at once, INNIT chose an unconventional debut strategy.

Cho Hyejin, Baby, and Achiraya were revealed first through the digital single "HUNGRY (Side A)", while the remaining four members were introduced gradually over time. This staggered rollout generated significant attention even before the group's full debut. Musically, OURBIRTHDAY combines modern hip-hop, performance-driven music, and experimental pop. Their debut track, "HUNGRY (Side A)," showcases powerful choreography, confident stage presence, and high-energy performances—qualities that JYP groups have long been known for.

The group's concept also stands out. The name OURBIRTHDAY represents the idea of celebrating every day as if it were a birthday, embracing joy, freedom, and new possibilities. The debut campaign was further promoted through a mysterious digital aesthetic and a series of "Error" teaser videos, such as ERROR 502: Bad Gateway, hinting at a futuristic storyline. So far, the K-pop community's response has been mixed. Many fans have praised the group's strong performances, impressive dance skills, and refreshing concept.

One of the main topics of discussion has been the unusual group name, OURBIRTHDAY, which initially divided opinions but has gradually become accepted—and even appreciated—by many fans. Overall, OURBIRTHDAY is widely regarded as one of the most promising new girl groups of the year.