한 Members of 90 project 90 project (나인티 프로젝트) is a South Korean Co-ed Group that debuted in 2025. They consist of 2 members: Kang Butter and Minseo. 90 Project is a project unit formed by singer-songwriter Minseo and producer/musician Kang Butter. The duo established the team with the philosophical goal of filling the missing "10%" in daily life through accessible, comforting music that listeners can easily digest. Return to Artist Read All Members 202420252026 Kang ButterMinseo Kang Butter (강버터) Full Name: Kang Yejun Date of Birth: 1998-02-09 (28 years) Zodiac sign: Aquarius Country: South Korea Active period: 2025-present Role: Minseo (민서) Full Name: Kim Minseo Date of Birth: 1996-04-09 (30 years) Zodiac sign: Aries Country: South Korea Active period: 2025-present Role: Vocal Images No images yet Return to Artist