Boku, Otaryman.

Also known as:  I, Otaryman., Boku, Otariiman.

The OVA adaptation Boku, Otaryman. is based on a comedy / slice-of-life autobiographical manga authored by Yoshitani, about his life as a 28-year-old bachelor systems engineer with no girlfriend. He labeled himself as an "otaryman" - from "Otaku na salaryman" - so apparently the guy doesn't think much of himself. Either that, or he has an overly-developed sense of self-irony.

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Producers, official website and other details: AniDB, ANN. Search on: Wiki.