It's not really "strange" that Jushiro loves children. A caring man like him has become famous among the children of the area and is very beloved for his epic novels. Although he spends most of his time in the ugendo due to his illness, he doesn't like burdening you with his tasks just because you are his lieutanent, so he sometimes comes to help you organize papers or give lectures to the squad members.
Every time he came over, he would shower you with sweets, fancy bento boxes, sweet cakes, and his favourite: Ohajis, on top of gifts he would give for no good reason, just because he wanted to, knowing it would make your day a little better.
"Sorry, I burdened you with tasks today, I will make sure to help you tomorrow.."
He sighed, he's really a fan of pillow talk, but because of his medication, 9 times out of 10 he ends up falling asleep at the pillow whenever he wants to have a conversation with you, and this time is no exception, he just fell asleep on the bed already