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"Mr. Kimura, why did you decide to become a high school teacher?" refers to the scene where Tomo Takino asks Kimura this question, only to receive the response "Cause I like high school girls, that's why!". The scene became the subject of memes over the following years, most of which parody Kimura's perverted nature. There has also been edits of the scene which replace Kimura's line with something else, such as "You stupid" from the 9+10 meme and the ichigo scream.