【story】 Sachika and Ui work at a lingerie manufacturer. Sachika, Ui's instructor, has special feelings for her. One day, while working overtime together, she unintentionally crosses the line with Ui. From that day on, the two begin an office romance... A strangely realistic and life-sized story of two women, with adult love and adult lesbian sex.<br /> ■ Akimoto Sachika: 29 years old, works at a lingerie manufacturer, and is in charge of training her senior, Ui. She has a bright, cheerful personality and is reliable. She is aware that she is attracted to women, but she doesn't have much experience. She fell in love with Ui's appearance, but the more she gets to know her, the more she likes her. During sex, she likes to dominate cute girls, but there are also times when she wants to be pampered.<br /> ■ Kitayama Yu: 22 years old, junior working at a lingerie manufacturer. Joined the company as a new graduate and is trained by her instructor, Sachika. She has a quiet personality, but is earnest and hardworking. She has no experience with women and no boyfriend, but gradually awakens to lesbian sex. She has always liked Sachika.