My apologies. I'll have to figure something out with the collar (Oh God that's the only balancer I could think of please help me.). But about his history. I know it is overused but I think it works out well in giving Ren a reason to let the dog kill his father. I could keep the mother alive but then there would be less of a reason his father would turn to drink. I'm sure I could create another one if you want me to.

Oh and it gave him another reason to want to leave Da-Hyun and travel around as a performer.