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.
It's group cooperative play completely 
different from sixty-nining.
.إنه نشاط جماعي تعاونيّ مختلف تمامًا عن الجِماع الشهوانيّ
Ganz anders als bei der 69-iger-Stellung,
wird das ein kumulatives Gruppen-Stelldichein.
¡Es un asunto
completamente diferente del 69!
¡Deja en bragas al 69!
Ce travail d’équipe vaut bien plus
qu’un simple 69.
È qualcosa di mai provato prima,
completamente diverso dal "sessantanove"!
É um jogo cooperativo,
bem diferente de um 69.
В этой игре не будет позы 69.