He's an Animal! (Underswap!Sans)

Sans walked downstairs, blushing profusely.
He had bunny ears and a little fluffy tail.
You practically melted right there.
"Awwwwww! You're so cuuuuuuuuuuute!"
You immediately began to pet his ears.
"Ha... Human..."
He hugged you close as you continued to show him affection. It eventually moved to the couch.
You bumped noses with him and giggled when he made a little squeak.
You gently grabbed his tail and blushes madly when you heard the noise that came out of him.
"Ah~! (N-name)~!"
...Welp.
That explains his lewdberry nickname...
You began to squeeze his tail, smiling when you saw him squirm and blush.
You attempted to press down on the tail, but the magic wore off. You had just smacked Sans.
On his butt.
Nice.
He squeaked and practically fell.
"Ah! I'm so sorry Blueberry! Are you okay?!"
He got up and blushed.
"Y-yeah. I'm fine."
You kissed his skull and hugged him.
"As cute as you are as a bunny, I love you just the way you are..."