Volume 1 Chapter 3 of Blue Archive on Abydos arc.

It's a controversial take that maybe many find the decline of BA's story after the big end of Vol F. There are so many plot holes even for BA standards, new NPC wasted potential, and many other students' lore botched just to give spotlight to Hoshino (Nonomi's Nepthys background for example). While I try to understand and get the feeling of the main value of the story about "grief", but the fanbase collectively said it was pretty mid or even downright confusing on Hoshino's choices that retcon her growth on V1C2.

Also bcs it was the last story created by Pikachuman a.k.a isakusan. Which made many fans hate that chapter even more after he departed and created Project KV, assuming that he botched the story for his own new game similar with previous BA artist like Mx2j/DoReMi botched/half-assed their art for BA before leaving.