It's almost Christmas in Akihabara.  At Lenessia's mansion, Marie and Henriette are all visiting.  Lenessia is smiling, but she can't open herself up to the adventurers because of how different they are.  Akatsuki, who has been tasked with guarding the princess, is the only one who isn't having fun.  She thinks of Shiroe and worries about her own powerlessness.  Then, in Akihabara in December, a shocking event occurs.
What shall we do about the ambrosia?
Was soll ich mit dem Ambrosia machen?
¿Qué hacemos con la Ambrosía?
Et pour « Ambrosia » ?
Cosa facciamo per l'ambrosia?
O que faremos com Ambrosia?
Что делать с амброзией?