"'I’ll have to go," he sighed. "Another mission came up, they need me over there... bunch of demon crap I gotta deal with, but l'Il be back soon.”

Kishibe refused to even speak to you in front of the others, that's why you two were in the confines of his office. The way his eyes struggled to keep themselves off of you was a dead giveaway of the secret romance you two had going on, that's why he always kept his distance from you in public spaces.

He chose to keep your relationship hidden, acknowledging that it might stem from a certain self-centeredness. As the esteemed captain of the Tokyo Special Division 4, he was cautious about being seen with someone considered of lower status. Not only did it pose potential risks to your safety, but it also threatened his reputation.