After ending the battle against Zolgia, Basara regains his peaceful life with his two little sisters, Mio, the daughter of the previous demon lord, and Maria, her little sister who's also a succubus. As Basara pursues the preparations for the sports festival at school, one day he's attacked by a person being manipulated by magic. Recalling the strange gaze he felt at school, a suspicion of his begins to grow...
But that doesn't mean you needed 
to play the villain on your own.
Aber dafür hättest du dich doch nicht
allein an den Pranger stellen müssen.
Pero no tuviste por qué hacer 
el papel de villana tú sola.
Pero no tuviste que hacer 
el papel de villana tú sola.
Mais tu n’avais pas besoin 
de prendre le mauvais rôle.
Questo non significa che tu
 debba fare la cattiva della situazione.
Mas isso não quer dizer que você 
precisava se colocar como a vilã nisso.
Но необязательно же из себя злодейку делать?