Yuka, an office lady working in the accounting department. She was raised as a proper lady, has a sharp personality, and seems to struggle with social interactions, keeping her distant from coworkers. While others attend the year-end party, she stays behind, diligently working overtime. A male colleague sets his sights on her, sneaking away from the party and approaching her from behind. Yuka is tied up with rope by the intruder and forcibly taken right in the office.