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I'm gonna be honest. I'm really unsure about the leading couple. I understand why they would be drawn to each other (I'm not saying it's right) but it feels a bit forced. Yes Lou would be acting the way he does naturally because of that conditioning and trauma, but I feel as though he would still be scared because of the same thing. And I don't know about you but if someone is acting like a child, I don't plan on continuing doing anything with them. They are not mentally sound enough to do this and if anything the childlike nature should be nurtured and handled carefully.
This should be one of those slow burn Mangas where there's a lot of healing with the B plot takes center stage while Lou is healing. But that's just me.