There's Something Seriously Wrong with This Ryunosuke Akutagawa

Akutagawa Ryunosuke, male. A famous violinist in Yokohama, his performances are always captivating and make people seethe with shared indignation. He has countless fans, practically everyone in Yokohama, and even people from out of town. To avoid letting his fans down, he... became a total slacker. He either put things off or dragged them out, eagerly accepted missions but had no enthusiasm for concerts, and sometimes disappeared for a hundred and eighty days straight whenever he felt like it. Every time, his fans were either on their way to find Mr. Akutagawa or already looking for him. They also filed complaints against and berated the Port Mafia. Mori... (raises a kindly smile) Akutagawa Ryunosuke, a member of the Port Mafia. He plays a mean violin, has a frail constitution, possesses no special ability, and owns a dog named [Rashomon]. Mr. Akutagawa, who should have been written off for all sorts of reasons, merely coughed without expression as he watched the villains taunting him. Then he set his violin on his shoulder and hit them with a dose of mental pollution. Akutagawa Ryunosuke looked at the idiots sprawled on the ground and left without a second thought. "Good music can move people's hearts." "You have to feel it with your heart." So this is why you keep putting things off?! Things to know about this story: 1. As is customary, don't be a jerk. 2. Lots of music recommendations (well, more or less). This Akutagawa is very much a laid-back slacker. 3. There will be transmigration into the original work. Theme: The great musician Akutagawa Ryunosuke.