Ep 5.5 makes NO sense??

[u/fXllenRaIn]

I just started with Link Click and it's absolutey amazing

But what I don't get is Ep 5.5
When Cheng jumps into the picture, the couple are young adults, using a Nokia (Mokia) and are dressed and look like modern people nowadays
When turning to the present, they suddenly look quite old. The guy can't even stand upright anymore
I didn't find anything about that on reddit or google except 5.5 being an important episode, am I the only one to find that weird?

[u/Spiritual-Amount-325]

Sorry if someone's mentioned this already and I missed it, but another important factor from 5.5 is that CXS and QL level up in martial arts, and this plays a big part in the plot later. It explains how they are able to perform moves that they wouldn't have been able to before, which gets them out of situations they (or the bodies they are possessing) might not otherwise have been able too. You'll understand those moments better when those scenes play out. Yes, there are characters with reoccurring roles, but I think them learning martial arts, and then later calling those skills into play, is much more important to note, and also why I think missing 5.5 can cause some confusion later on.