In order to defeat Impurities that turned out to be far stronger than expected, Itsuki is pressured to perform a "Double Love Ritual" with two maidens at the same time. It is said to produce powerful Star Children, but it has never been performed before. Itsuki steps into uncharted territory, following the lead of onee-san maidens Reone and Falun.
The academics knew 
of this from ancient texts,
،كان الأكاديميّون على علمٍ بهذا انطلاقًا من النّصوص القديمة
Los eruditos lo sabíamos
por los textos antiguos.
Los eruditos lo sabíamos
por los textos antiguos.
Les savants en parlaient
dans leurs études.
Gli studiosi ne erano già al corrente,
grazie agli antichi testi.
Os estudiosos já sabiam
disso pelos textos antigos,
Учёные читали об этом 
в древних книгах,