Director of the Hat Spring Project, Kumiko Takagi (miko-miku) made the second song, "Hazy Moonlight". The Yomiuri article (Sep. 7th, 2016) is about the song .
The lyrics are co-written by Yu, who is an ALS patient, and Kumiko.
Diagnosed with ALS, I got into the depths of despair that day.
I still cannot get the shock out of my mind.
Enormous fear and tremendous sorrow
Though I feel my tears welling up in my eyes,
I can no longer wipe them away alone.
But some are giving me support closely,
Others are encouraging me quietly and remotely
Getting ALS gave me opportunities
To feel the warmth of people more than before.
Going through each uneasy day,
I will live my life,
Connecting with different people.
Yu July, 2016
This song has English, Korean, Chinese lyrics and is being translated into other languages now.