Haruna Aizawa thinks that school life is just like a monkey mountain--all the monkeys form cliques, get into fights, and get back together again. The school that she just transferred to is no exception. There's even a boy called Macharu Yamashita who reminds her of a baby monkey!
Haruna and Macharu take to the stage once again when their class decides to do a rendition of Romeo and Juliet. Haruna's uneasy about acting in front of the entire school, especially since her father might show up for the performance. Will the play bring Haruna and Macharu closer together or end in absolute disaster?