Tanaka Ayano, is a teacher who has been given the nickname "Iron Masked Girl, Tetsuko" by her students due to her not interfering her students more than necessary and not interacting with the other teachers. Tanaka is actually an otaku who fell in love with Hitotose, a character from an otome game. One day, Tanaka was confessed by her student, Murai. Tanaka immediately rejected Murai as she has never fell in love with a real man, let alone her student. However, the next day, Murai appears with a new hairstyle and he looks exactly like Hitotose.