Keima and Elsie have successfully conquered Ayumi and captured the loose soul.  ──But they haven't completed their contract yet...!!
Elsie transfers into Keima's class, declares that she's his little sister, and announces that she's going to live in his house as well!
All for the sake of rounding up the loose souls in this city...  Who holds the next loose spirit?  And will Elsie be able to become Keima's little sister??
N-Now we have the same blood
running through our veins.
A-ahora tenemos la misma sangre 
corriendo por las venas.
A-Ahora tenemos la misma sangre 
corriendo por las venas.
A-Agora temos o mesmo
 sangue nas nossas veias.