Once upon a time, there was a loyal dog named Buddy. Buddy and his friend, a little fish named Fin, loved to play together. One day, they wanted to play a new game. Buddy said, "I can borrow some oxygen from you, Fin, so I can swim with you in the water."
Fin agreed and Buddy borrowed some oxygen from him. They swam and played in the water, having lots of fun. But then, something unexpected happened. Buddy used up all the oxygen he borrowed from Fin, and he needed more to keep swimming.
Buddy asked Fin to give him more oxygen, but Fin said, "No, I need it to breathe too." They started to fight over the oxygen. Buddy took more oxygen from Fin without asking. Fin could not breathe and got very sick. In the end, Buddy felt bad for taking the oxygen, but it was too late. Fin was gone, and Buddy lost his best friend.
