Random drabble (Duck Eggs?)
None of them suspects anything, not even the genjutsu expert, until one day a sword comes too close.
They'd noticed he was being protective of his belly, yes. Giving it more room, fewer near-misses simply due to distance. Sakura thinks maybe he got hurt on a solo mission, that he'd had to push his own intestines back inside that slender body through the parted, translucently pale, blood-stained lips of a wound. Anyone would be more cautious after that.
They don't know that the near-misses never stopped.
But suddenly there is a flash of red in thin air, and Kakashi-sensei's belly is rounded like the egg of a duck, with a thin line of blood seeping into his clothes, staining the black thick and sticky-dark.
They won't listen when, once the enemy is dead and questions can be asked or answers demanded, he protests that it's all Tsunade's fault.
Even if it is Tsunade's fault, they don't want to know how or why.
Disclaimer: I do not own Naruto, and for this you may blame the company of barside trivia.