Arai is a mangaka who is serialized in Jump. His manga debuted in the issue of Jump before Detective Trap. It is called Cheese Okaki. He used to work as an assistant for Mikihiko Azuma.    Arai is friendly, mostly getting along well with whoever he meets.     (Source: Bakuman Wikia)

After the decision to serialize Moritaka and Akito has been made, they are introduced to Miura, their new manager. At first, the two thought it was a joke, but Hattori gives them a pep talk before leaving. While Miura doesn't seem like a bad person, he is given to rudeness and seems to be worried about the duo's future. In addition, the duo are given three assistants to work on their manuscript, and with the assistance of Ogawa, an experienced assistant, their work progresses well. <br><br>
At the start of the new year, Moritaka and Akito both attend Shonen Jack's New Year Party. There, they meet Hiramaru Kazuya, said to be a genius of a whole different level from Eiji. 

Average student Moritaka Mashiro enjoys drawing for fun. When his classmate and aspiring writer Akito Takagi discovers his talent, he begs Moritaka to team up with him as a manga-creating duo. But what exactly does it take to make it in the manga-publishing world?
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(Source: Viz Media)

Takanori Arai