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.
So you would fight me in the rift between 
the real world and the spirit world?
Wünschst du mich in der Kluft zwischen
Wirklichkeit und Geisterwelt zu bekämpfen?
¿Quieres pelear entre el mundo
de las personas y los monstruos?
¿Quieres pelear entre el mundo
de las personas y los monstruos?
Tu veux te battre entre ce monde
et celui des morts ?
Mi vuoi combattere al confine 
fra questo e il mondo degli spiriti?
Então você lutaria comigo na fenda 
entre este mundo e o mundo espiritual?