A shy and gentle new employee, Jun Kusui, has a slightly airheaded side, often getting caught up in trouble due to small mistakes. On a business trip, she ends up drinking alcohol by accident despite not being able to hold her liquor, quickly becoming completely drunk. Her boss takes her back to the hotel, but due to a reservation error, only one room is available, forcing them to share. At first, she firmly resists his advances, insisting, "I have a boyfriend," but her body betrays her words—highly sensitive and responsive, she repeatedly moans and climaxes over and over. The once-mistaken subordinate undergoes a stunning transformation during sex, turning into a lustful woman who actively craves her boss's cock. A thrilling scenario unfolds as he grows increasingly excited by her dramatic change.