一十三十一, whose airy, coquettish vocal—often described as aphrodisiac-sounding—drives urban pop, will appear on the heart-throbbing "Friday Night." They debuted in 2002. Their 2012 album CITY DIVE leads the era with a refined sound that sublimates the influence of city pop, and is widely hailed as "one of the defining albums of the 2010s." Since then, they have continued to release a string of conceptually driven original albums. In addition to collaborating with many new-generation creators, they have been active in a variety of fields, including music for commercials and narration, providing backing vocals for Kenji Ozawa, and serving as the lead vocalist for the neo-doo-wop band "JINATANA & EMERALDS." A vocalist who captivates an era, in 2020 they will shape the "social space" of the new era.