Ren agrees to take Mana around to see the town, but she's anxious about and uncomfortable around Monster Strike.  When Ren gives her a MS ring, however, she gladly accepts it, thinking it's an engagement ring.  When she realizes her mistake, she runs off in shame... and that's when a monster makes it move.
You are the beings steeped in 
worldly desires, aren't you?
Seid ihr die Wesen,
die der Begierde frönen?
¿Son ustedes los pecadores impuros?
¿Sois vosotros los pecadores impuros?
C’est vous,
les impurs qui salissent ce lieu ?
Siete voi che traboccate di lussuria, no?
São vocês que estão cheios de lascívia, não são?