Hatsuse Kotori is a high school teacher. It was kind of natural, and although it was treated as a friend by the students, it was supposed to be an exemplary good teacher who always thinks of them first. One day, a mysterious handsome young man saves me from being accidentally entangled in a thug. He was a former student, Soichiro Haibara, who was four years ago and made me sloppy with the strength that he was away from ordinary people. After reuniting after a long time, they decided to go out for a meal. However, Thympira and his friends appear again there. "I will always protect my teacher, because I'm always my teacher--..." I was surprised by Harahara's unexpected confession. I was hugged by his powerful arm and suddenly got nervous-... ......Ah? Is the pattern that you see on Harahara's arm a tattoo? Or...!? A non-stop, forcible courtship from a former student who had become a young man. What can happen to this relationship that I can not resist!?