This is "二人セゾン(Futari Saison)" and "Spring of Life" mashup.
Please try to hear if you like.
-Used Songs Data-
欅坂46(Keyakizaka 46) - 二人セゾン(Futari Saison)
Perfume - Spring of LIfe
Audiomack
http://www.audiomack.com/artist/ptera
Soundcloud
http://soundcloud.com/ptera
http://soundcloud.com/ptera-mix
http://soundcloud.com/ptera_2nd
Mixcloud
http://www.mixcloud.com/Ptera/
Twitter
https://twitter.com/_283ptera_
- Release Date:December 16, 2016
