Shisui x Itachi "Promise Me No Promises" Fanfic

Itachi Uchiha has known Shisui Uchiha since he was four. As they grow older, they both grow feelings for each other. They finally spoke their feelings once they were teenagers. But their relationship must remain a secret. The Uchiha clan won't settle for a homosexual relationship.
Flash forward years later, Shisui is 25 and a successful Uchiha police officer. And Itachi is 21 working as a captain of the Anbu. Their relationship is still in secrecy from the public eye of Konoha. They remain happily together until conflicts suddenly form within them and the Clan and maybe a secret admirer.

This story tells the tale of drama, a conflicted love triange, lust, and painful confessions within Shisui and Itachi. Will their relationship remain everlong? Or will they part ways after many years together from being simple innocent little kids practicing their ninja skills.