In the competitive K-pop industry, a crucial factor for success is to distinguish oneself from the numerous idol groups debuting annually. A particular girl group has managed to do just that, causing a stir on various online platforms and social media.

Cosmosy, a four-member girl group, made their debut on a Korean music show on April 11 with a distinctive elf-concept. Their performance of the debut song "Lucky=One" on KBS's 'Music Bank' caught the attention of K-pop enthusiasts and online users. The group comprises four Japanese members: Amei, Kamión, Himesha, and De_Hana, and is managed by NTT Docomo Studio & Live and Sony Music Entertainment Korea.

With elf ears, colored contacts, and blonde wigs completing their look, Cosmosy boldly presented a seldom-seen concept in K-pop. Their unique appearance succeeded in capturing interest, prompting Korean netizens to seek more information about the group. Comments from Korean netizens suggested a mix of curiosity and skepticism regarding the group's concept and execution.