Both songs were produced by musician Ringo Sheena, who covered "Ketteiteki Sanpunkan" for her album Gyakuyunyū: Kōwankyoku in 2014.

The Ringo Sheena-lead band Tokyo Jihen performed the theme song for the drama, "Tengoku e Yōkoso".

[citation needed] The sond was first performed by Kuriyama at the Valentine Special Live concert at Shibuya-AX on February 12, 2011.

[7][8] Usui was a director who had previously worked with Sheena on videos such as "Kōfukuron" (1998), "Kabukichō no Joō" (1998), "Koko de Kiss Shite."

[10] Interviews appeared in February and March editions of What's In?, BLT, Pichilemon, De View 50, Otona Lab, The Japan Times and Tower.