Yuka, whom I date at the same workplace, was a girlfriend I could brag about, almost too good for me. She's beautiful, has a great figure, is cheerful, and gets along with everyone... Her popularity among the men in the office was outstanding. From the irritating middle-aged boss to my close colleague and the newly hired junior. I used to respect her for getting along with everyone so well... But I didn't realize what was happening behind that popularity. Yuka was fucking around with all of them. While I was buried in work, she was layering her body with the office men so easily and happily. "Resist a little more... Why are you having sex so happily...?" It's frustrating. Frustrating. Sad. Painful. And yet... for some reason, my crotch was getting hot. "I'm sorry for cheating," she says. "But why is your dick getting so big?" Ah, why the fuck am I getting hard...?