That is a bit sad the way she felt, but sadder when you think that this means their families lost their young daughters but a bit happy to have the relationship between them. Good friends
solid backstory intermission chapter, but overall im pretty concerned at the pace of this manga overall. there seem to be quite a few of these >1-month-between-release-manga out there atm, and i really feel its a bit of disservice to the story. its generally causes a decent amount of the audience to have to re-read to remember just what is going on and who several side characters even are.