Hmm. I don't know if this comic has done straightforward ominous foreshadowing before—I feel like every time before now either there's a bait-and-switch or it just gives it to us. On the other hand, this feels too explicit to be a fake-out.
The tiredness thing would appear to be "sympathetic pregnancy": https://health.clevelandclinic.org/couvade-syndrome-sympathetic-pregnancy
These chapters don't really feel dark to me, but that might just be because I don't think this comic ever telegraphs its dark moments. Anything that looks...
just noticed that her arms are around his shoulders in the last panel despite going under them in the second-to-last, and I'm having trouble unseeing it.
to everybody worried about her eating Haneda's head: Haneda isn't a mantis. he'll be fine.
seriously, does nobody start at the very beginning? it's a very good place to start.
edit: looks like I missed a chapter being uploaded like 3 hours before that . whoops.