Commentary translates roughly as "This pic and the next one are connected, please view them from the previous and next works." Refers to this pic and post #4752770

These pics together recreate a scene from one of the early episodes where Honoka and Nagisa get in a big fight over Nagisa's crush. IIRC Nagisa is saying something like "Just because we've fought monsters together doesn't make us friends" and Honoka is taking that... about as well as she possibly could under the circumstances.