This part talks about both children and only Cats and Ah-ya. As the name implies, it's about tragic events just because the two "lost" each other's moments lead to misunderstanding can not be saved. There is a segment of A-ya is "Tomorrow will come again, he will still be with me, I thought so", and his is "Tomorrow will come again, he is no longer, love letters sent to goodbye. " The lyrics also roughly sum up the price that they both get together again. This melody can be a combination of all three songs: Lonely Hide and Seek [Kodoku no Karurenbo], Kanzen Hanzai Love Letter, Shuuen no Shiori [Bookmark of Demise]_ Song : Re:FUzai Chakushin_ Vocal : Hatsune Miku_GUMI