16.
After his second year at Hogwarts, Harry gets a surprise. Apparently, he has a twin, Serenity Potter, who was once Usagi Tsukino. Now, Harry will learn about planetary magic while protecting his twin from Voldemort, his 'friends', and fanboys!
Rated: T - English - Family/Romance - Chapters: 15 - Words: 41,137 - Reviews: 180 - Updated: 2-9-12 - Published: 12-27-10 - Usagi T./Serena/Bunny/Sailor Moon & Harry P.