Any ending that is conclusive or satisfactory would be just the opposite of the entire point of the story. For Tobio, it doesnt end. The guilt of causing so many deaths is not something he can ever erase or get over, and that is the point. He does not have a path to ordinary happiness. He either...
I dont know if this is adapted from a novel and if that novel is any different but this ending just felt completely unsatisfying. The author clearly had a lot of very interesting and potentially great ideas, but completely fumbled in the execution. So many times major plot points seemed to just...