Aileen overcame all the difficulties and got engaged with Claude. Just when she thought she found her happily ever after, she receives news that a demon named Ashtarte attacked a human village in the Mirchetta region. Sensing new dangers, Aileen infiltrates Mische Academy in the Grand Duchy of Mirchetta to investigate the situation. There, she meets James Charles, the last boss of Regalia of Saints, Demons, and Maidens 2 as well as the other quirky members of the student council.
It's time to start my school 
life disguised as a boy!
!حان وقت بدء حياتي المدرسية متنكّرة كفتى
Hiermit beginnt mein Leben
als total männlicher Schüler!
Une vie scolaire mouvementée
m’attend !
È il momento d'iniziare 
la mia vita scolastica nei panni di un maschio!
Hora de começar minha vida escolar
disfarçada de menino!
Пришла пора…