I Failed the Exam and Streamed Indefinitely

I failed the exam and streamed indefinitely There is a very strange rule in country A - students who fail the exam or fail... Are sent to the battlefield? The government has introduced a new rule that will require school principals in the local area of ​​Nese United not to expel students who fail their exams, but to put them on academic leave in exchange for signing a contract with the Ministry of Defense... I haven't decided yet whether the main character is a boy or a girl.