Kiseki - ano hi no sobito

"While Jin leaves home against his father's (Kobayashi Kaoru) wishes to pursue music, Hide studies to become a dentist. After hitting roadblocks in his career, Jin discovers the enormous potential of Hide and his dentist friends, and stakes his dreams on them. Hide, however, fears his father's wrath and wants to somehow continue with both dentistry and singing. They come up with the radical idea for GReeeeN to debut without showing their faces to the public"-- from YESAISA