I'm Here (Supergirl AU)

When Kara Danvers was changed into a Golden Retriever puppy, the first thing she did was panic but she was eventually found by Lena Luthor, whose heart was won over by her puppy form. Lena Luthor swore to take care of her, and Kara couldn't help but do the same in return.

......Alex wasn't gonna be happy.

(This story is also posted on my AO3)