Koi no Fuga (恋のフーガ; Fugue of Love) is the fourth single of the Hello! Project duo, W. The title track was later included on W's second studio album, 2nd W. The single was released on February 9, 2005 on the Zetima label. Unlike their previous two singles, "Koi no Fuga" is not an original W song. It was originally released by The Peanuts in August 1967, as was the singles coupling track, "Furimukanaide". This song had been covered before W in the 80's by Wink. A Single V DVD containing the music video was released on February 23, 2005. The single sold 15,729 copies in it's first week of sales, selling 20,922 copies in total. The single peaked at #4 on the Oricon charts. The single V sold 8,342 copies, peaking at #4 on the Oricon charts.