I Only Have Six Months to Live, So I'm Gonna Break the Curse with Light Magic or Die Trying: Volume 3

My academy life continues, but I hate the unfair caste system that causes discrimination in the school. I know I can't change it all by myself, but I can't just stand back and let this inequality continue. Meanwhile, I decide to investigate a large hole that mysteriously appeared in the academy. What secrets does it hold? Can it help me get rid of my curse? I'm excited to learn everything I can, but I'm suddenly transported to unknown ruins while a dangerous monster awakens from its centuries-long slumber. I have to get out of here so that I can save my friends and my kingdom before it's too late!