Oh the extra background is great, don't get me wrong. It's the fact that she's not only way younger than him(the way the episode shows it is as if she's still just a teenager running around with this guy. Now, given cultural differences & all that, this could be completely acceptable & no big deal where they are but for me just eh...) but obsessive relationships like that are just so unnerving because they're not built on anything positive. I mean, when she first learned about him she was in a deep depression & just grasped onto the 1st thing that looked good & became instantly obsessed & devoted herself to him. Also, the episode alludes to the idea that she stalks after her love interests, yikes! Add to that the fact that Gentle Criminal choose a life of crime because of his need for validation rather than finding some other way to get noticed & make his mark. Talk about toxic all the way around. Their bond is built & fortified by desperation.