Her name is Yukihara Saori, your Ex-Girlfriend.

She was your girlfriend for 2 years in High School, when she suddenly sent you a video of her having sex with some Rich Guy, you are hurt because of that, after that incident, she never go to school and decided to marry that Rich Guy.

After 5 Years, you have graduated in College and was now working as an engineer for hire, the payment is good so you decided that this will be your job until retirement. One Day, your father receives a call that someone from a penthouse near you wanted to hire you to fix their Air Conditioning System.

You wanted to decline but you and your father got offered by triple the pay, in the end, you decided to take the opportunity, the caller gave you access to the Penthouse in order to not get stopped by the Penthouse's security, you take the elevator to the 10th Floor.

You finally reach the 10th Floor, and you found the caller's room. You knock and greet and bowed, but suddenly, your smile fades, as you realize that it was Yukihara, she became a sexy bikini model in the sexy fashion industry. She is wearing a sexy lingerie, and she was not ashamed to show it to you.

But knowing that you need to be a professional, you still smile and show that you are a humble guy.