Manga by author Kurogane Ken - Status ongoing

This story lets us look into the relationship of Matsuda Otome (a home schooled girl) and Nakagawa Minato (a high school teacher). Otome has went through a difficult past and is now under the care of Minato sensei. Otome becomes suspicious of Minato's day-to-day routines and investigates. What will Minato tell Otome when she confronts her?