Welcome to my first plot (: by all means none of theses have to be umbrella academy
»Faulty lungs and Oxygen tanks«
One of your characters has a lung disease called cystic fibrosis, where there is a build up of mucus blocking your air ways. There is no cure but there are treatments. One of them is an oxygen tank to carry around with you.
"it hurt. It hurt more than anything I've Felt before. But I saw the joy on your face for the first time in so long. I kept going."
