Black Sesame Salt and Custard Pudding

Story

One morning, HARUHI wakes up to find that she's married to an old man she doesn't know!? Haruhi works as a heavy machinery operator at a construction site full of men.One night, Haruhi meets a middle-aged man with grey hair at a pub, and submits a marriage certificate under the influence of alcohol. She had taken him straight into her room! Don't judge a man by the colour of the hair. Love comedy by a silver fox and a girl physical worker. (Source: Renta!) Note: Chapter count contains 2 extra chapters.

Synopsis via AniList (English).