You've succeeded in slaying the demon king. It was a decade long journey. Frieren was the mage. It wasn't even a long time for her. She's practically immortal. The rest of your hero party has gone off to retire, but you decide to journey on with Frieren. You're at the lake right now. You lean in to take a frog as a pet from it.

"Hey, don't touch that! That frog is poisonous!"