With the benefit of hindsight I feel like I really should've picked up on the girl's older brother being the murder journalist's boss. His shirt choices are not exactly subtle, and the sister mentioned he worked at an occult magazine in the previous chapter.
So the girl from these chapters was traumatized by seeing the old man fall from the balcony in chapter 3, and ended up getting got by the serial killer who killed the hoarder author in chapters 4 and 5. That effectively ties together chapters 3 through 7, but at a quick glance there's nothing obviously tying the first two chapters into the rest of them. Maybe we're due for a return of ghost-seeing blind girl and the negligent bunny owner.
Edit: Actually, wait a second. I re-read the first few chapters and is the dude who bunny girl had a crush on in chapter 2 the murderer? The dude in the chapter 2 flashback's got a similar hairstyle, and even specifies that his place is a bit messy when he invites her over, but she declines out of a sense of obligation to her ill-fated bunny. They look similar enough that it could be a young murder journalist with dyed hair. That'd tie chapter 2 into the overarching plot we've got going.
There's also a mystery boyfriend in chapter 1 that appears on a single page, but there's only one panel showing his face. But now I am suspicious of him in a way that I was not when I thought this was a series of standalone vignettes.