It's funny how the author wasn't aware of the "twisted" or "dark" themes of their own story (which is actually relateable). The essence of name and identity is a core element here that's why names will be redundant to a point of it being impossible to forget their names after reading. We have an abused child who has nowhere to go and an orphaned boy who found his dead brother in him. Together, they will have to settle their past and face reality.
Koko Wa Yasashii Niwa