Shinoda-chan, the staff member, started to notice the upstairs neighbor since moving into the new apartment because of her alluring and sexy attire and her hot body, even though she was married. Coincidentally, he accidentally discovered that his colleague was a student in one of her cooking classes. From there, opportunities began to arise when he was invited to attend a class with him. At first, he thought she was a diligent and gentle woman, but as he gradually got to know her, he realized his assumptions were completely wrong. She was unimaginably lewd, right from the first day displaying provocative behaviors towards him, and in the following days, it was no different; going to the cooking class but treated by her as a sexual plaything.