After the end of the year-end party, they return to the office and drink again with the office ladies who have finished their overtime work. As the alcohol continues to flow, a game of King's Game begins. As they get more and more drunk with punishment games such as chugging, things gradually become more erotic, with kisses through plastic wrap and skirt lifts... They even follow the girls who have left their seats to go to the bathroom and have sex with them. Is the office full of sex at night?