Sweet potato cannon season
:D

I suppose that if Nagato fired off her cannons, they'd get hot enough to bake a potato, and at 40cm/16" they're definitely large enough... She doesn't seem too happy about the arrangement, however, which is uncharacteristic for Nagamon around destroyers.

I think its fair for Nagato to not like sweet potatoes. She looks more disinterested than upset.

Based on the author's other strips, Nagato always wears a face of stoic beauty. Most of the time.