YOSH!
Finally no. 5!
I accidentally found this on mangafox. It's called Dragon Voice.
Dragon Voice - Status: Incomplete
It's about a boy called Amami Rin with an unbelievably low voice which everybody thinks sounds totally horrible. People tend to say that he looks handsome (I don't get this part until a little later) but has a terrible voice.
He has no confidence in his voice even though he loves to sing, and makes some side money from dancing to some idol's dances along with a friend or two.
One day, he chances upon a group called Beatmen. They were trying to get into the building which he made money outside without being noticed (and failing quite terribly) and trampled over his sign.
At first, everybody thought his voice was just plain noise, but the leader of the Beatmen, Shino, thought that his voice was unique.
Beatmen's boss also thought that too, when he met Rin properly for the first time. He suspects the voice to be the legendary Dragon Voice, a voice that 'is said to shake the land, and avoke fear in people, just like the roar of a dragon. Once the people are charmed by the intense characteristic of the voice, they will hear a beautiful shining angel-like voice. The illusionary voice that combines the shape of an evil and the brightness of an angel'.
But his untrained voice sounds really horrible.
On top of that, before he could get his voice perfect, it seems a challenge has come up against their rival company, S Field (or something), unintentionally initiated by Rin himself.
Their outdoor concert was cancelled due to a sudden downpour near the end, thus the audience count was 0, while their rival, S Field's Privee held an indoor concert and drew 3600 people who apparently didn't leave, and according to the deal, Beatmen and their company disbanded.
In an attempt to revive Beatmen, they search for their boss' master (their boss was arrested because of inability to pay off his debts due to loss of job). The final result was that they were tools used for filming a show called Voice Rangers.
The 4 original Beatmen members were 4 out of the 5 Voice Rangers, while a girl called Sakura was Voice White.
Rin, due to his weird husky voice, had the role of Prince Desharmony (did they purposely spell it wrongly?), in which form I think he looks tons cooler, maybe because of the tatoo under the left eye and the outfit. Oh! The hair too!
Anyway, Voice Rangers is about 5 Voice Rangers battling to save the world of music from Prince Desharmony, who, due to his terrible voice that all of Zon are born with, cannot sing even though he enjoys it a lot.
Through this filming process, Rin learns many new techniques on how to better articulate his words, express feelings through dance and body language, and also make use of his deep resonating voice to the fullest.
The drawings are really nice.
To me, that is.
The humour is great.
To me, that is.
The plot is even better.
To me, that is.
The characters are unbelievably unique.
To me, that is.
Anyway.
What I am saying is, GO READ IT.
Here: Dragon Voice