Nimmu and Missing Friend

Its a story about Nimmu, a sixth grade student in India, who moves to a village and struggles to settle there. As the days progresses, he wins new friends and establishes equations among them, and starting to enjoy his school life. Gopu Joins school in the middle of the year and he becomes Nimmu's best friend. How he earned Gopu as his best friend and why he is missing the friend is the story.