Well, that was an eye-opener. I have heard that work ethics in Japan was hardcore, to the point that people didn't have enough time to live a life outside their work, but here's a concrete example of it. I guess it's an example of living your dream, although that dream may as well be torture. I think the fact that they're doing this job because they're passionate about it is really nice, but nobody should seriously work themselves to death.
Anyway, based Studio DEEN cheers to the animators out there.