Age 28. Hiroko's boyfriend.  Like Hiroko, Shinji works long hours. He also frequently travels on business, making it difficult for the two of them to spend time together. Shinji isn't as successful in his business endeavours as Hiroko, however, and this leads to more problems in their relationship.

Hiroko Matsukata is a woman who works for a magazine company. She puts all she has into her work, and is known as a strong, straight-forward working girl, who can at will turn herself into Hataraki man (working man) mode. Despite Hiroko's success at work, her life lacks romance. Even though a hard worker, she'd leave early anytime to go on a date. Too bad her boyfriend is even bigger a workaholic than Hiroko.
 
(Source: Anime News Network)

This is a set of one-shot stories of working people drawn from the viewpoint of Matsukata Hiroko, who is a 28-year-old single woman and is an editor of Weekly Magazine, JIDAI. She&rsquo;s often at odds with Tanaka Kunio, a novice editor. Her work already stresses her out and he&rsquo;s unapologetic about his own mistakes! Everyone refers to Hiroko as a masculine woman for how seriously she takes her work. She smokes too much, works too much, and never has sex. However, when it&rsquo;s time to get a story done, she switches into &ldquo;Working Man&rdquo; mode where her testosterone in her blood increases, she works three times her normal speed, and all thoughts of life&rsquo;s necessities disappear. (Source: Entropy) 
Note: Manga is on hiatus since 2009.

Shinji Yamashiro