kein was one of the most popular of the so called "Nagoya-kei" bands. Their music can be compared to some more recently known bands such as deadman or Aliza Marie and was very dark with catchy melodies that allowed the guitarists to show their skills.
Visually, the band often wore black clothes but sported more colorful hair as a contrast, making them similar to bands like Vizell and Phobia, though these were founded later on.