"Truth (A Great Detective of Love)" is the 13th single by J-pop duo Two-Mix.

Released on November 26, 1998, it was the duo's first single under Warner Music Japan, following their split from King Records.

Composed by the duo of Shiina Nagano and Minami Takayama, the song was used as the opening theme of episodes 124–142 of the anime TV series Case Closed.

[2] It sold over 228,710 copies and was the duo's final single to be certified Gold by the RIAJ.

An English-language version was recorded on the 2000 self-cover album BPM Cube.