曲谱简介：

Kokoro Kokoro is a song performed by Kagamine Rin, a Japanese VOCALOID developed and distributed by Crypton Future Media, Inc., and was initially released in December 2007 for the VOCALOID2 engine. And Kokoro tells a story about a robot (Rin) made by a lonely scientist, but is missing a program unable to be made: a Heart. Some time after her creation, her scientist passes away, leaving her alone for several hundred years. She begins to wonder about her creation and makes a wish. She accesses the files that her creator had left and finally gains a Heart. In the process, she discovers what its like to be happy and sad. With her new feelings, she gratefully dedicates all of the songs that she sings to her creator. In the end, the miracle robot had a short in her system and could no longer sing. However, she had a smile on her face in her last moments, resembling an angel. A sequel named "Sayonara Arigatou" was made for the album of the same name. It tells the story of the robots creation and the making of the heart told from the scientists (Gackpo) point of view. He explains that he had felt lonely but when he made the robot, he was finally able to love someone and he wants to give her the same thing she gave him, a heart. But creating it takes such a long time that by the time he is finishing it, hes dying of old age. He begs her to smile for him and wants just a little more time to say "Thank you". This song is featured on the compilation albuma EXIT TUNES PRESENTS Vocalostar feat. 初音ミク andKARENT presents TIME TO SAY HELLO! feat. Hatsune Miku, among others.