さよならありがとう (Sayonara Arigatou)

Background
The sequel to "Kokoro." It was made for an album of the same name and is in Toraboruta-P's first album, "Torabotic World". It tells the story of the robot's creation and the making of the heart told from the scientist's (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, he's dying of old age. He begs her to smile for him and wants just a little more time to say "Thank you".