The story of a plain salaryman who, while harboring feelings of inferiority towards his handsome and sadistic salesman colleague, does a good job of nonetheless being pampered as his masochist doggy.
To save his sister from being married off to the dead, Io disguises himself as the bride-to-be and is carried off for the spirits to have their wicked way.
While his partner is at work, a man and his nephew lover (distant relative, no blood relation) get horny, hot, and heavy. Features dirty talk, cuckoldry, adultery, younger seme, cross-section views, etc...