Wait [Shisui Uchiha - Modern AU]
Shisui Uchiha has left the country to study abroad in Europe. He left behind his best friend Itachi, as well as his good childhood friend Arisa.
Before he left, he had the intention of telling Arisa a secret, but decided that instead, he would tell her after he came back from his trip abroad.
"Will you listen?"
"Prologue" Chapters 1-23.
After that, it's the "real" story.
It's a mystery! Do take note ;)