I did not write this nor do I own this book it is written by XxDia-RosexX. So please go check out her/his fan fiction page in the link below👇🏻 https://m.fanfiction.net/u/2509345/ Ace and Sabo looking for Luffy wander into a cave and end up 12 years into the future. Through the craziness they meet their Little brother now 12 years older than them. What are two kids suppose to do when their Older-Little Brother looks at them sadly but smiles at them with glee? They try and make him happy again that's what!