Is Natori finally realizing the one who changed the plot was herself.
Though Diana then help her get out of the panic state and steer the conversation into asking Natori about 'future she want' (instead of the 'foresaw' future)
is basically Diana vs Rubeus
then Lapis joins in and the 2 v 1 easily overpowering Rubeus
ends with Diana and Lapis do the summoning calls.
Diana and her dragon get a double page
while Lapis SMUG while carrying Natori in her arms
tl;dr is hype and I really hope it's poly ending
EDIT: Woke up to ch 17 raw being up
Prince show up to end thing on more comedic and peaceful note.
Then while Natori is away to get some MP potion for Diana, Diana try to tell Lapis that she is going to let go because to Natori Lapis is #1, and surely Lapis is the same, right?
Lapis looked...distressed.
Diana note her hesitation, and left saying that if Lapis is like this Diana won't be able to give up on her feelings.
Lapis, left alone, monologue that BECAUSE Natori is precious to her that she HAS to let go.
I don't quite get how his plan would lead to the prince killing diana. Like, it not only depended on diana's magic going out of control, but it also required the prince to deem her enough of a threat to people (that likely left the area by themselves) that he needed to actually permanently put her down.
So like... Lapis is getting a taste of Natori's agency, while Natori is making Diana fall for her and trying to save both Diana and Lapis. But Lapis and Diana are both in love with Natori.