Haruka has always wanted to be a teacher, and finally her dream has come true. It's a complete coincidence that one of her students is Yuzuru, a childhood friend who's more like a little brother. He still acts like their relationship hasn't changed, but Haruka needs to draw the line! At least, that was the plan, until she realizes how much of a man he's become... He teases and squeezes and pinches and presses, and all Haruka can do is hope for more! Yuzuru's sweet, angelic face hides the heart of a little devil!