Manga by author Nomura Tetsuya - Status completed

From Yen Press: A young boy named Roxas whiles away the last days of his summer vacation with his three best friends in their quiet little home of Twilight Town. But all is not as it should be in this hamlet nestled between night and day. Strange things keep happening around Roxas, which always seem to involve mysterious creatures and he is plagued by dreams of a boy named Sora, whom he has never met. Bewildered, Roxas searches for answers. Will they lead him to Sora, Donald and Goofy?

In Kingdom Hearts, Sora turned the Keyblade on himself in order to release Kairi's heart, but his heart was also released in the process. This brought about the creation of Roxas, Sora's Nobody. Unlike most Nobodies, however, Roxas has no memories of his past. He joins Oragnization XIII and slowly begins to discover the truth behind his existence and the Organization itself. He meets and befriends the fourteenth member of the Organization, who also has no recollection of her past. What will Roxas see during his time in the Organization? What is the connection between him, Sora, and the fourteenth member? And what becomes of them? Dive into the heart of Kingdom Hearts storyline's biggest secret.