Matenai After Five / Kasa wo Sasu Senpai (待てないアフターファイブ／傘をさす先輩; I Can't Wait After Five / My Senior Holding Up the Umbrella) are two songs by Country Girls. They were digitally released together on August 24, 2018 as part of Upcoming's Music Delivery corner.
The release of both songs was announced on Upcoming on August 23, 2018.
Fukuda Kanon did not know that her lyrics for "Kasa wo Sasu Senpai" would be used until the release announcement and posted her surprised reaction on Twitter. She sang the demo for it herself which she usually only does for songs that have not been accepted yet.
Meanwhile, KOUGA seemed to be unaware of the song's release date and found out from fans messaging him on Twitter that it had already been released.
On her blog, Yanagawa Nanami stated that "Kasa wo Sasu Senpai" is her favorite Country Girls song to date.