Ch 1: Waking Up In Another world??
After the Great Ninja War 4 Sasuke was kept in prison as before the War he was a wanted criminal and this story continues after the war (note sasuke hasn't lost his arm). Sasuke is released from prison and is set travelling to find more wherabouts of Otsutsukis and Kaguya .After travelling for a while(around 4-5 days) sasuke's left eye is starting to get dizzy by dizzy a portal open ups and sasuke in mind (this must be the portal for Otsutsukis place) sasuke enters the portal and is transgrimitted to another world and his age is decreased to 12 (luffy-9,ace and sabo 11 years old )he fall from sky and is lying on ground .
While luffy ,ace and sabo where talking they heard a lound voice 'badump' as they checks to find who or what it was that falled and made a loud noise they searched and found a chid unconscious. They hurried him to their secret base and treated his wounds .
[Timeskip-3 days later]
sasuke wakes up and was not able to recall anything that happened after travelling through the portal and the place around him was not of his understanding while he was on bed he sensed someone who was coming while saying i will become the king of pirates sasuke takes the postion for fight and as luffy enters and sees sasuke awake he says ace and sabo the guy is awake who falled 3 days before and upon hearing voice of luffy they comes to check on him(sasuke) who are you all asks sasuke .Luffy replies i am luffy and they are ace and sabo pointing his hands towards them and we saved because u fall from tree and was badly injured .Sasuke asks them "why did you all saved me even if you guys dont know me".
Luffy and sabo says we thought u are a good guy thats why. (sabo is ignoring sasuke).Sasuke says alright i trust you all i am Sasuke uchiha nice to meet you all.Luffy asks out of curosity why were you falling from the tree ?. sauke thinks for a while in mind(this dosent looks like my world i need a fake story and trustful so that they can trust especially that guy called ace he dosent looks like luffy) sauske replies well to be honest i was actually kidnapped by a huge bird i dont what bird was that and as far as i remember i was carried and manged to escape and i ended up here. As luffy totally idiot accepts the story ,sabo asks "sasuke are you strong?"Sauske replies i am pretty sure i am strong,luffy says whoa how about a fight between you and ace,ace is the strongest amoung us. sasuke says sure i guess (in mind i need to find more about this world).Ace says "nah i wont fight a weakling and pathehic like you." Sasuke says are you afraid my friend?
Ace is angered hearing this he says alright i will fight you, we will fight after 2-3 days as you are still injured