"Nah, you can keep me." you said.
"Are you sure?" asked your teacher.
"Yeah," you said, "I don't need to be anywhere. I'm perfectly fine being nothing more than food."
"If you're alright with it, I'll digest you."
She begins rubbing her belly as her stomach acid starts melting your body down. You enjoy the feeling as your flesh comes off and is slowly absorbed. After a while, parts of your skeleton are exposed to the digestive fluids and most of your flesh is just a pile floating around. The size of your teacher's belly has shrunk greatly at this point. It doesn't take too much longer for your consciousness to fade. You had a good time becoming your teacher's new belly fat.