Before leaving again, Sasuke shows Sarada how much he loves her by giving her the same gesture he once gave Sakura, the forehead poke, and promises to come home soon.
Sasuke shows Sarada how much he loves her by giving her the same gesture. He once gave Sakura the same gesture. He once promises to come home soon the same gesture. Sasuke was leaving again. Sakura is the forehead poke.