@V-Oblivion: I'm sure you're aware of Bandai censoring a post-finale interview where Suletta's voice actress mentioned Suletta and Miorine were married by removing that reference and stating their relationship status is up to interpretation. Now the final Blu Ray release came out and included an interview with director Kobayashi where he states twice in no uncertain terms that they're married. They also added Miorine's wedding ring to the airport scene where it was missing in the TV airing.
Based on the expressions I'm guessing Bocchi was leaning in to look at Kita's workbook, and Kita just went for it. In a few seconds they both might start sputtering nonsense, but for now all is right with the world.