A bit surprised that the sword demon agreed so easily ._.
But she is the poison master why didn't he at least take some time to think about how trustworthy 2 strangers are. Especially when there's a chance that she could poison his daughter and kill her off. I get that his really desperate but he didn't even take time to think about whether or not they can be trusted!!
I didn't read the novel so idk but wouldn't it be really cool if 'D' is actually kumoko's human future but the world collapsed but she was able to go back in time as an administrator and decided to make kumoko something else and help save the world
Just a thought ( ̄∇ ̄")
The previous scene in the manga with the demon lord is what‘s going to happen in the future. It‘s when kumo chan alrady evolve into humanoid. You can read it on the side story of the novel. Maybe it‘s been a while you read them that you forgot.
Anyway, MAJOR SPOILER:
D is not kumoko. Whether the demon lord is kumoko or not, I‘m not gonna spoil coz it‘s an intresting twist in the story.
Just a hint: remember some of kumo chan‘s awareness that‘s travelling to mother now? They are gonna have a big role in how things gonna go in the future.
Read this if you wanna get spoilers: http://kumo-desu-ga-nani-ka.wikia.com/wiki/Kumoko
@pax PFFT U CAN TRY