Shiryu Sejima releases 'BAD GIRL' music video featuring Korean rapper REDDY

By Sam 20 May 2026

Shiryu Sejima has released the music video for his second single, 'BAD GIRL.' The track features Korean rapper REDDY. The video premiered on YouTube on May 20, ahead of the song's official streaming release.

Shiryu Sejima with blue hair in a black suit

Sejima made his major label debut last December with 'Steppin' Out.' The 'BAD GIRL' video is the first of four planned for release this year, with others scheduled for summer, autumn, and winter.

In this first installment, Sejima portrays a youthful character, showing a pained expression as he is toyed with by a woman. REDDY appears as a more mature counterpart. The song blends Sejima's vocals with REDDY's rapping over a groove-based track.

Sejima, born in 2001, began dancing at age six and later trained under choreographer Koharu Sugawara. He danced on the Korean audition program '소년판타지 (Boy Fantasy),' hosted by TVXQ's Changmin.

He has since danced in music videos for artists including Kenshi Yonezu, Daichi Miura, and MISHA, and performed as a dancer on Yonezu's world tours from 2022 to 2024. He also works as a model and choreographer.

Shiryu Sejima and REDDY in a dimly lit setting

REDDY debuted in 2011. His 2016 single 'Think' featuring Jay Park was a major hit. He has collaborated with artists like SKY-HI in Japan and participated in Mnet's hip-hop competition 'Show Me the Money 5.'