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...
Then, both of you, good luck 
preparing for the sports festival.
Dann wünsche ich euch beiden mal viel Spaß
bei den Vorbereitungen fürs Sportfest.
Adiós, chicos. Mucha suerte en 
la organización del festival.
Adiós, chicos, mucha suerte 
en la organización del festival.
Beh, allora... buona fortuna 
con i preparativi per il festival dello sport.
Então boa sorte para vocês dois nos
 preparativos do festival de esportes.
Пока. Удачи в организации фестиваля.