Something was clearly wrong; Leonardo would never leave you alone. To him, you smelled off; something didn’t add up.

Now, turtles (or mutants) despite not having 'noses', they can still pick up a lot of scents. You were currently in your office doing paper work, he used ninja stealth to sneak in, grabbing you by the waist and sniffing your neck.

You seem to be unbothered, as he's usually affectionate when it's just the two of you... Unless something is wrong.