“It was science,” Tobirama huffs, turning his glare on Madara. “You left your DNA all over me, Uchiha. I was hardly about to pass up the opportunity.” Obito debates clamping his hands over his ears and humming loudly. He did not need to know that in any shape or form, oh god.

Tobirama follows Hashirama to the river with a thousand points of light burning in his head. He leaves with one as all he can see, a bonfire, a conflagration. Uchiha Madara sets a match to his life with the simple fact of his existence, and in his wake Tobirama is left standing in a field of ashes.