Miyuu Kohinata is a junior coworker who has always looked up to her senior. On their first business trip together, she forgets to book her room, leaving them with no choice but to share. Over drinks, she teases him about what he will tell his girlfriend, calls him unimpressive but strangely cute, and promises to pamper him until morning. It was all her plan to steal him for herself. Once she presses her enormous H-cup breasts and soft, pale body against him, resistance becomes impossible. The smiling coworker he once saw as merely a junior reveals a seductive, aggressively sexual side and takes control of their night together.