This song was written for the game Hatsune Miku Project mirai 2. the original version is sung by Len, while the game offers a vocal switch for KAITO. It was uploaded the onto both Nico Nico Douga and YouTube on October 26, 2013, since then, it has entered the Hall of Fame on NND and reached over 1 million views on YT. This song is included in HoneyWorks' album Zutto Mae Kara Suki Deshita. and a version sang by Yuu's voice actor, Kamiya Hiroshi is included in Boku Ja Dame Desu Ka?.