This could be going better.

"So, you're not with him?"

"We're in the middle of a lover's spat, but that doesn't undo all of our years together. Even before we died."

It was a gamble, but it seems like Setsuna is unwilling to help Nezumi, which makes the guy hesitate, though Nezumi can never understand people who think catching someone in a lie somehow wins them more time.

"You're lying."

"I would never do that."