Please, I don't remember anymore but I feel like the premise is pretty specific.
I think in chapter 1 the main character was like fanaticizing out loud with a co-worker about coming how to a warm meal and the ML overheard them and then when he got home ML was actually there waiting sitting seiza with a warm meal. Naturally MC lost it and thought he was crazy but the food looked too good and he just slowly accepted them living together like this MF didn't just break into his house. He only remembered this was a bad thing when it got to bedtime and ML got into bed with him and insisted on performing his "wifely duties" but of course MC was like 'no thanks' so ML decided to 'take charge' instead so MC got poked. I might be mixing up another story with a ML 'Bride', idk.
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Help me out here. I've been trying to search for this since last night but google is useless. I thought it would be easy but it's been maybe 5+ years since I read it so it's not in my Already Read list either. The only things I remember are that he's a salaryman and so is the other guy. I'm pretty sure he's his boss or something and they basically keep work and home life separate. At work his bride is serious but at home he's loving and kind.