Akai Canvas Series - Nadeshiko ~Aka no Rasen~

The main character is from a rich family. His future will be secure if he just follows his parents. But he can't stand it, and doesn't want an arranged marriage with his childhood friend. Because he is in love with his maid, Imari. Of course, his parents don't allow it. He decides to go out and live with her. He starts to work at a high school as a PE teacher, and she joins it as a student. This is a bittersweet love story about a couple...

[From ErogeShop]

The game is set in the same school with Canvas 2, the main character here is the same PE teacher on that game too, but this story starts six months earlier.