I've seen Please!Teacher,its pretty good.Its about an alien woman who comes to Earth to monitor the planet.The problem was that someone saw her when she came,his name was Kai and he had a rare disease which caused him to fall into a coma when he was under a lot of stress.The alien became the teacher of his class and she immediately new that was the boy who saw her so she confronts him and she decides he has to marry her to insure he won't tell her secret.