Yoru No Gakkou E Oide Yo!

Hayasaka Yoru lost her parents, and was taken in by her relative, Enomoto, who is junior high school teacher. Her house is called the "School House", because it is located on the school premises and the students would gather there and have fun every day. One night, at school, she saw the scariest guy in her class feeding a duckling which lead to her thinking that he wasn't that scary. This is where her love story begins.