“You'll always be by my side and I by yours.”
Those are the words said by the can-do-nothing-for-himself university professor Yukinari Nishina. His childhood friend Miyu enjoys nothing more than spending time with the man she has secretly always been I love with. But something has always bothered her. And that is the way he always tells her not to come see him after 9pm. She follows that until one day she simply has to go see him after 9 and as she enters his room she sees... a Yukinari like she has never seen before. He roughly grabs her and covers her ears, his hot breath falling on her ears. This isn't the man she fell in love with! She suddenly starts to both fear and want him and their relationships barriers quickly begin to crumble once she learns his secret.