快晴 (Kaisei)

Background
Thank you very much. "Kaisei" is an original song by Orangestar.

This song was initially featured in the album Re:Start with Hatsune Miku as the vocal, and was released in August 30th. The uploaded version featuring IA was released in the 31st, gaining over 600,000 views on Niconico and over 1 million views on Youtube.

This song has entered Hall of Fame.