K - ep06

It seems that the red clan motivation goes far deeper than just seeking revenge, this becomes clear as we get to look back Totsuka's life before he died. Although one of the interesting facts about him is how much he seems to be like Shiro, in his carefree ways. In the beginning it seems that Mikoto didn't really like him because he felt that Totsuka was an annoyance. Although later on we see that through his persistence Totsuka became accept by Mikoto. Then over time Totsuka is what held everyone together, through his carefree spirit. This is why when he was murder, that it drove them over the edge because of the injustice that they felt. In seeing what leaded up to Totsuka death their action may in fact be justified.

Then in parallel to Totsuka's final moments, you have Shiro questioning his existence. Then with this Shiro start to encounter that fact that people are forgetting him. He first encounters this when he calls Kukiri to get direction to the firework shop because he can't read his own writing. Although before that Neko acts strange, although when he does call her she doesn't even know who he is. This lead him to try and valid his existence by calling his parents, but it seems the number he called isn't in service. Then when he goes to his house, he instead ends up in a sports stadium.

This leads to the reason why Shiro was so desperate to justify his existence, because now he beliefs that he never existed to begin with. This leads him to think back to all the people he talk to when he was searching for proof and how they say he wasn't there. Shiro think now that it is possible that he killed this person, and hopes to have Kuro end his suffering by killing him. However he refuses because he isn't certain of anything. That they just need to wait and find out the truth, because there is more going on than just a simple murder. In fact I belief that there is some sort of link between Shiro and Totsuka. Since their personalities are so similar, everything seems to hint at the fact that one day Shiro just came to exist. This seems to point at one simple truth who is Shiro.