Fics like Chose His Fate.

In which Tony decides he doesn't want to be with his soumate and choses Bruce. Starts post-Avengers but mainly post-Civil war. Tony is massively injured during civil war, builds a house in a forest, fixes most of the accords leaves his supporters with the ex-Avengers as they are reinstated and moves away. Que the Avengers lead by Tony fighting Thanos. General angst and Tony is (precious) right. Thor support.

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