Monmon Retsusai is the poetry teacher at Mochinoki Middle School.
Monmon is the "secret weapon" Mr. Touyama brings to his history class when he tries to fail Kiyomaro as part of his revenge. All of the male students besides Kiyomaro became infatuated with Miss Monmon's cute appearance and sexy voice. Even though she is considered to be Mr. Touyama's "secret weapon", Wriggle doesn't like Touyama even though she likes seeing him "love sick" over her (or "agony" in Japan).

Takamine Kiyomaro, a depressed don't-care-about-the-world guy, was suddenly given a little demon named Gash Bell to take care of. Little does he know that Gash is embroiled into an intense fight to see who is the ruler of the demon world. All of the demons have to pick a master on Earth and duke it out with other demons until one survives. Needless to say, Kiyomaro becomes Gash's master, and through their many battles, Kiyomaro learns the importance of friendship and courage. 

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