[Machine Translation] elfin' is a four-member vocal unit consisting of members who originated from the "All-Japan Beautiful Voice Contest," which celebrated its 10th anniversary in August 2025. Since the onset of the COVID-19 pandemic, elfin' has focused primarily on live performances and digital releases. Marking the return of their flagship event, they are releasing their 7th single their first in five years. The title track, The Whole World," is produced by composer Ryosuke Ishii, who has previously worked on AKB48 s Sayonara Crawl" "Ikiru Koto," Nogizaka46 s "Setting Temperature," and Sakurazaka46 s "Soul Liar."