Moo Hokage, Moo!

"Tsunade Senju will turn into a cow girl, with horns, her ears turning into cow ears, and growing a cow tail. Her boobs will also start to lactate a sweet milk, and she will feel immense pleasure when she is milked, and enjoy it second only to giving tit fucks. Her tits will not leak milk in this form, only releasing it when the nipples are specifically sucked on. She will also have a constant urge to moo, which will only grow stronger until she lets it out, at which point, it will reset to the weakest level, and start building up again. She will be able to swap between this form and human at will, but prefer the cow girl form, and mainly keep the human one for the sake of appearances," Naruto wrote in the Sex Note, and once he closed it, Tsunade, who had stripped naked in anticipation, began to moan, and leaned forward on her desk as she writhed, her boobs pressed against the desk as her nipples puffed out a little.

She wiggled her ass as her tailbone sprouted out a long thin tail, her eyes closed while her ears grew out, changing into cow ears. "Mooooo..." she cooed, Shizune staring in awe at what the Sex Note was doing to her boss. Tsunade blinked, and then mooed again, and then basically shrugged to herself, deciding to enjoy the remainder of her transformation.

Tsunade's hair parted at two places at the top of her head while two horns grew, curving upward. Soon, she was panting on her desk as her new tail flicked about. "Mooo," she crooned, sitting up and looking over herself. "...you are so perverted Master," she teased, winking at him as she walked over to the other side of her desk and sat backwards on it while facing him.

Naruto was of course grinning even as Shizune stripped, so as to masturbate at the sight.