Fujishima Yui is currently a university student. This summer she returned home, but her parents went on a trip abroad because they didn't know where to go, so she asked to stay at her high school teacher's house. Fujishima Yui's big breasts combined with her Never wear underwear, it's always visible before your eyes, making it irresistible to the teacher! The two continued to flirt with each other until Fujishima Yui's parents returned...