High school student Yuge Itsuki was sent off to a strange parallel world with his childhood friend Konatsuki Mahiru. It was the magical world of "Granvania", which was facing a crisis from the threats of "Impurities." Itsuki was summoned to this world as a "Visitor" to save this world, but to accomplish this mission, he had to perform a ritual known as the "Love Rituals..."
and a proven strategy that 
will dictate all our fates!
!واستراتيجية مُجرّبة ستُملي جميع أقدارنا
und eine geschichtliche Kehrtwende
wird unser aller Schicksale leiten!
y una estrategia probada
que dicta nuestro destino.
y una estrategia
que dicta nuestro destino.
c’est une stratégie historique.
nonché una storica scelta strategica
che influenzerà il destino.
E fazer nascer ou não
também faz parte da estratégia.
и проверенной судьбоносной стратегии!