0:11 - Shy Boy - Hug Hug unit (Yerin, Eunha, Umji)
3:26 - Monday Blues - World Peace unit (Sowon, Yuju, SinB)
Apparently, both of these songs were considered as GFriend's debut song, but they ultimately went with Glass Bead. (this is according to fan buzz, can't find a source though)
Source: YouTube: GFRIEND OFFICIAL
track 1 reminds me of orange caramel's abing abing, (IT'S AMAZING) and track 2 is like... three songs in one. i hope we'll get studio versions of these!