From the husband's point of view, it is a pretty bleak situation. He gets stuck in the office, slaving away to make money to support a wife he was forced to marry, while she gets to have fun all day, spending her time in the company of other men whose company she certainly appears enjoy more, and be more comfortable with than her husband.
For her, it's not so bleak, if at all. Luckily for wifey, he also happens to be an all-around nice guy. She gets a free ride, financially speaking: he slaves away to provide for her and she doesn't have to go out and get a job and, if Japanese laws are anything like where I'm from, she gets to live off his pension after he croaks at an early age from a job-related, stress-induced heart attack. She also gets the benefit of his free labor fixing up her run-down shack. All this, and more, and she doesn't even have to have sex with him like a normal wife would, particularly since he is such a nice guy and, unlike most men in the same situation, does not force himself upon her. Yeah, yeah, I know. They are destined to eventually end up in marital bliss but, for now, the husband certainly has been dealt the short end of the stick.
And, from this point on, it gets even worse for the husband...