If I listen to my thoughts carefully
I could see the face of my friend
The fresh fragrance of the cool summer evening sky
The days of the past are still so vivid
夏夕空 = Natsuyuu sora [summer evening sky]; This song is the ED of 夏目友人帐 [Natsume yuujinchou) season 1. I like how the soothing tune and the voice of the singer conjure up the mood of the lyrics. Especially when you listen to it in a quiet place.