1. The opening theme song "Assuko" Singer: Yui Horie
Lyricist: Atsuko, Composer: Atsuko, KATSU, Arranger: KATSU
2. Ending Song "Explanation" Singer: カスタマイZ
Lyricist: Miyazawa Ryusei (GoRA), composer: GRP, Shun Kusakawa, arranger: GRP
3.K Season 2 The BGM at the beginning and 6 minutes of the first episode is Mikio Endo's "showdown"
4.K The episodes that appeared in the first episode of the second season include Mikio Endo's "Showdown", "New Kings" and "Suoh" Mikoto》
K'S Theme Mikoto Endo, just search for Mikoto Endo