Princess Bubblegum drinks a potion that causes her sweat to dissolve her clothes. Finn agrees to find her new clothes in exchange for her taking erotic poses and being walked through the castle like a dog.

Once back in her room Princess Bubblegum gets dressed and calls the guards, only to realise the potion hasn't worn off. Finn agrees to help her again in exchange for sex and her becoming his maid.

https://civitai.com/collections/2351337