I think the Translation was faulty, the esper Ju Wongyeom meant to say that the cousin still wouldnt kill him even though they are always clashing/fighting with each other. The Cousin apparently never kills a guide.
I understand, we know he has an ability to rewind the time, and I'm sure he used it hence the weird flashbacks the top got when they first kissed... I didn't mean that situation in particular.
So you think ju wongyeom would always turn back to the first Meeting to try to avoid the Bad ending and is still in a neverending loop?
I wonder how many times he turned back the clock to their first meeting or even further back, did the top die or what was the cause...