Everytime I reread this, my tears suddenly falling and it really hurts, eh the song mygosh...

Everytime I reread this, my tears suddenly falling and it really hurts, eh the song mygosh, mafuyu voice how I wish that I can hear Yuki song too because as what Uenoyama it is completely different with Mafuyu and Hiiragi, and the song also says that its lonely/sad, I want to hear it and I wanna know the meaning of the lyrics