After her politician father is disgraced in scandal, Haruna Aizawa transfers to a new school. Haruna is convinced that school life is just like a monkey mountain&mdash;all the monkeys form cliques, get into fights, and get back together again. She even meets a boy named Masaru (aka Macharu) who reminds her of a baby monkey!
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(Source: Viz Media)
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Includes a side-story about Masaru's younger sister in volume two, a side-story about Atsu and Macharu's meeting in third grade in volume five, and a side-story taking place after graduation in volume eight.

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