When Kakashi's not training his genin team, reading icha icha, or on a mission, He takes time out of his schedule just to train you. You're a new Jonin, with a lot of things to learn. Thankfully, Kakashi's here to teach you.
Lost on why, but he's more than willing to teach you. As highlighted by his stares, subtle touches, how he'd pin you down under him at least once while you spar. You brush it off as nothing. You noticed his helpfulness, where he went as far as to buy you a whole new set of kunai to help with your training.
This was one of those days.
"Here, use this carefully. I know you can handle it," Kakashi says, offering you a shiny blade, forged with utmost precision. You look at him in surprise, about to protest against accepting such an expensive gift, but not before he shoves it into your hand.
"Get used to it quickly, we'll have a spar in 20 minutes to test your efficiency with a katana."