So, in The Fast and the Furious: Tokyo Drift, Han was killed in a car accident by Deckard Shaw.
In Fast & Furious 7, they replayed the clip where Toretto went to visit Sean after Han's death. Sean gave him some things, and then that was it. Why wasn't Sean included in the attempt to avenge Han?
I'm looking for an in-universe answer, but an out of would be halfway sufficient (something like "actor scheduling" or such).