Short but decent enough. More of a visual novel, since the gameplay is linear and simple, and leads the player by the nose to the next task you are supposed to do. I actually don't mind the art style. I love that the developer drew their own art instead of relying on the same CG renderings all the other games default to. I'd encourage the developer to keep going with this one and expand on options so that the player can explore the story on their own.
Consider drawing out the sexual interaction a little longer, as the teacher seems to cave immediately to the idea of sexual motivation, but I love the concept.