A Japanese hip-hop duo consisting of rapper R-Shitei who won three times in a row in Japan’s rap battling competition and DJ Matsunaga who won the 2019 DMC World DJ Championships.

Their single "Bling-Bang-Bang-Born", released on January 7, 2024, as the opening theme for the second season of the anime series Mashle: Magic and Muscles, topped the Billboard Japan Hot 100 for eight consecutive weeks, becoming the duo's first number-one single on the chart as a lead artist. It was also a worldwide hit, reaching number eight on the Billboard Global 200.

The duo, who performed the opening and ending theme for the 2022 animated series Call of the Night, had a cameo performance in the anime's sixth episode.

Several songs have been certified by Recording Industry Association of Japan in the streaming category, with "Nobishiro" certified platinum.