YOU SAID:

I am so angry now. I end my school 30 minutes later

INTO JAPANESE

私はとても怒っています。 30分後に学校を終了します

BACK INTO ENGLISH

I am very angry. Quit school after 30 minutes

INTO JAPANESE

私はとても怒っています。 30分後に学校をやめる

BACK INTO ENGLISH

I am very angry. Quit school after 30 minutes