Akito and Mimane have joined the troubleshooters office, and will be helping Kazuya and his friends with exorcising troublesome amasogi. The only problem is that they're also secretly part of the group that has been causing amasogi incidents!
I know it was only an oath, 
but we're still siblings...
...أعلم أنه كان وعدًا فحسب، لكننا لا نزال إخوة
Und wir sind doch Geschwister,
wenn auch nur per Schwur!
Sé que solo somos hermanos
por juramento, pero…
Sé que solo somos hermanos
por juramento, pero…
Et puis,
nous avons un lien fraternel !
So che era solo un giuramento,
ma siamo comunque fratelli...
E somos irmãos, mesmo
que de consideração...
К тому же мы брат и сестра,
хоть и сводные!