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.
I definitely detect the faint 
scent of a love triangle.
Ich hatte also doch den Geruch von ’ner
komischen Dreiecksbeziehung in der Nase.
Huele a un triángulo amoroso.
Huele a un triángulo amoroso.
Ça sent le triangle amoureux.
Sento puzza di triangolo amoroso...
Realmente está com cara 
de um triângulo amoroso...