[It's probably a good thing Yukine's news is of interest, because it means Shun is distracted from that beaming from Ren before he has to spend several seconds deciding exactly how much the word "cute" might apply to it. He's still not very good at dealing with that sort of thing.

In particular, as soon as Yukine mentions what the trip is about, Shun's attention sharpens, and his eyes narrow.] I'm still going to worry about it if any leads come up again, but I'll hope you and your god can get to the bottom of it without needing that. [So he's not outright stepping back, but he is at least trusting that Yukine and Yato know what they're doing in this particular instance.] I destroyed the one I had - just kept the photos Munakata took when we found it. The person I asked to look into its magic couldn't get much out of it, and I didn't want to risk the Heavens coming down on anyone for me having it at all.

[Not coming down on him, notably - if Shun was the only one in danger of heavenly retribution in that kind of instance, he'd be a lot more willing to run the risk of keeping it.]