Best Please! Teacher Charcters

A half alien half human who comes to Earth to monitor the planet and to learn more about the Earth as its where her father came from she becomes the new school teacher however following strange circumstances after Kei discovers her secret and the two are found together in the gym equipment storage they are forced to lie about being married to avoid Mizuho being fired and though she and Kei were only suppose to pretend to be married they eventually fall for one another.

The main protagonist who is actually 18 but looks 15 which is the result of one his stand stills which is a coma like state that occurs under extreme emotional distress and in once instance he was in a stand still for 3 years he discovers his new teacher Mizuho Kazami's secret of being a half earthling half alien the two are later forced to get married when their found together in the gym equipment room by the principal they eventually do fall in love for real but their relationship gets a bit rocky between having to keep his and Mizuho's relationship from everyone including his friends as one of his friends Koishi is in love with him and his stand still problem.

One of Kei's friends who despite looking 15 is 21 and also suffers from stand stills she tries to become a matchmaker for her friends Koishi and Kaede though she was successful in setting Kaede up with Hyosuke her attempts to set up Koishi with Kei has been futile and gets upset when Kei turns down Koishi and the stress causes her to enter into another stand still after Kei finds out and not wanting her to go through another stand still breaks things off with Mizuho in order to go out with Koishi but this blows up in their faces when Koishi finds out.

Kei's friend who has feelings for him unaware that Kei is married to their teacher Mizuho.