Elsa and Yvonne have mastered the secret technique of Open And Clear Clear Couple Communication, so not even a powerful princess can threaten their relationship at this point.
How many times have you time traveled, girl?
Yvonne [with her best Miles Miller thousand-yards stare on]: "123".
Is this chapter the end of the manga?
The way it says sounds like it is
It does sort of seem that way, but it's also only the second chapter of volume 9, which would be a weird place to end it considering most volumes have like 15 chapters.
The flashback Circe has of 'Yvonne' saving her actually looks more like Garth than Yvonne. I'm thinking it was Garth that actually saved Circe back then.