We decided to have a drinking party at someone's home with everyone from work. Even though it's called a drinking party, we who work at the bookstore are just light drinkers and go home by the last train. Yeah, that was how it used to be… This time, the new part-timer, Umino-san, is participating for the first time. The well-behaved and serious glasses-wearing woman, who is highly evaluated by her colleagues, was drinking alcohol eagerly due to nervousness and before she knew it, she was completely drunk. Since everyone at the bar had gone home, I thought about taking care of my drunk junior colleague but ended up staring at his big ass. Then he suddenly asked for anal sex! I was surprised by the sudden change, but out of a sense of responsibility, I helped him graduate from being an anal virgin. Just fantasizing about anal insertion, finally achieving an anal orgasm! Lit up the hidden sex drive of that dull girl and kept cumming inside her asshole all night long!
