Throwing A Stone In A River

When Sakura graduates from the academy, she suddenly finds her head invaded by the ghost of Uchiha Shisui. Her inner is gone, but not forgotten, and she struggles with impulse control more than ever before. But also, Shisui gives a lot of unsolicited advice - useful and otherwise - and does not shut up. He's not thrilled about current events. Not Shisui/Sakura