[Prince of Tennis] The Lost Record

In fact, it is the story of the two songs "Kokoro" and "Kokokoko" by Kagamine Twins. A heartless robot created by a lonely scientist has the key to the "heart" of its own program. It was not used until the scientist died long ago, and then he understood the meaning of his birth - a person is too lonely. Then she sang until she completely broke down, and her song was also conveyed to the distant past. It is considered by scientists to be the fourth miracle - the first miracle is your birth, the second miracle is the days of getting along with you, the third miracle is receiving information from you in the future, and the fourth is no longer needed (perhaps because scientists who have always wanted to complete the heart program know that this program requires a lot of consumption, and also understand that future robots will eventually break)

Who wrote these?

Um. . . Was this article originally in Japanese?