This is AKB48 song Kinjirareta Futari sang by YuiParu and actually, the lyrics to this song gave me the idea to write my story I'm writing now:
In the grove is a morning mist
Like somebody’s sigh
By the lake not on the map,
I found this in one of the comments for the video:
Translations for the conversations! [ Kana is the girl with curly hair and red jacket, and Aki is the painter who's secretly in love with her. ]
0:15 Kana: Hey, are you listening? Aki: Don't move. Kana: But...! Kana: What do you think I should...