Aizawa Haruna is having a hard timein her life. Her father, the politician, was caught in a scandal. Her friends walked away. And she scares that her boy friend would be ashamed of their relationship. She’s transferred to a small town’s High school. Her new school is so crowded and full of over happy people. She calls it saruyama, the monkey mountain.
On top of it, she meets a short boy who makes her smile. It’s her little monkey. His warm heart has melted hers. And soon, love grows between them.