Tetsukamen, Tokechau! ~Toshishita Kemono Ouji no Midarana yubi Tsukai~

Sakura Saotome is a new teacher at a prep school. She starts wearing glasses to hide her baby face and makes sure she's extra strict with her students so they don't look down on her. Her alter ego's so believable that her students call her "the lady with the iron mask." Unfortunately, this new look isn't helping her personal life, until one day one of her troublemaker students, Satoshi Igarashi, shows up...