Megasuki! ~Kanojo to Boku no Megane Jijou~ Toono Shiori Hen

The main character, Makoto Kougami, has just transferred to a new school. He has a crush on his beautiful math teacher, Shiori Toono.

She is a serious and inflexible girl who is not well received by the male students. However, Makoto is crazy about her.

One day, he sees her taking care of a cat. The two quickly become closer through their common topic of conversation about the cat she keeps at home.

Can Makoto be able to break down her firm guard?

[From official site]