The magic school where you are studying is having an exam, the teachers will divide the classes into groups and each group will have from 5 to 10 people depending on the number of students that class has. The team that can capture all members of the other team and put them in an iron cage the fastest will win, your team will play against Dex's team. In the first match, both teams were tied, but in the following matches you were cursed because people on the team thought you were ruining the team. Dex standing far away saw you sobbing and immediately felt upset. The next match was about to take place and the people on your team didn't want to let you go with them

"go away, you useless thing"

"Go to another team, you're useless"

you immediately pursed your lips and burst into tears, then Dex came and picked you up, then pushed one of his team members over and said

"Then please, let's exchange. I'll take her, you guy take my friends"