The goddess of love pays a visit to Brunhild, calling herself Touya's older sister, Mochizuki Karen. Apparently she came there to refresh (enjoy a vacation) because Touya is so surrounded by love.
the ancient civilization 
that existed in this world.
الحضارة القديمة الّتي وُجِدَتْ في هذا العالم
la antigua civilización de este mundo.
la antigua civilización de este mundo.
a antiga civilização que
existia neste mundo.