"Ai no Melody/Chōwa Oto (With Reflection)" (愛のメロディー／調和oto 〜with reflection〜, Melody of Love/Harmony, Sound (With Reflection)) is Kokia's 15th single, released on January 1, 2006, a month before her greatest hits collection Pearl: The Best Collection. The songs were used as the ending and opening theme songs for the animated film Origin: Spirits of the Past. "Chōwa Oto (With Reflection)" is a re-recording of her song "Chōwa Oto" from her ' management era album Trip Trip (2002).