'Red Fruits') is Japanese boy band Kis-My-Ft2's 20th single, released on CD on November 29, 2017 by Avex Trax.

[1] This title song was written as the theme song for the television series Key Person of Interest Detective starring Yuta Tamamori, and the title means "truthful truth, true heart.

"[1] The music video (MV) for the song was shot on location in a medieval European-like town in Wakayama Prefecture,[2] the first time in three and a half years since "3.6.5".

The use of chains was inspired by the aforementioned drama starring Tamamori and proposed by member Kento Senga.

The DVD included in the first edition A contains two music videos for "Akai Kajitsu," while the first edition B contains footage of the members playing the loose sport of hand soap ball and a preview of their upcoming video work "Live Tour 2017 Music Colosseum" to be released the following year.

is included as a coupling song for all forms of the album, was used as the commercial song for Kowa's new hand warmer "Nukunuku Toban", and the English lyrics are sung to sound like the Japanese "Quickly Hot Hot".

Azusa Ogiwara, the writer of Real sound which move from a dark world of "darkness" and "fall" to the hope of "salvation," are effectively expressed by heavy rock-style guitars, low-pitched strings, and short single-note pianos.