"Kimi no Egao" by Hanako Oku
Curator's Note: I first heard this song in a promo clip for Kase-san and Morning Glories (attached under the "read more"). I keep forgetting and remembering this song, and every time I remember it but forget the name I look up "bloom into you anime promo" first, before I have to look up "yuri anime like bloom into you" and immediately remembering as soon as I see the words "kase-san". This happened again today and it will never happen again, now that I've put the song on here. Yippee