Black Black Heart

Naruto as a boy saved Pein and brought him home. Pein stayed with Naruto for sometimes and two got attached to one another, when Pein had to leave it sadden Naruto but he comes back only to say goodbye but then Naruto decided he wanted to be with him. Naruto is now part of the Akatsuki and everybody adores him but when he grows up he leaves without a word to his family but...