Kroi is a Japanese rock/rap band formed in Tokyo in early 2018. Their name comes from the fact that mixing all colors creates black, or kuroi (黒い), and they use this to describe how they mix all sorts of genres.
The members are Leo Uchida on vocals and guitar, Masanori Seki on bass, Yuuki Hasebe on guitar, Daiki Chiba on keyboard, and Hidetomo Masuda on drums.