Agatha, the Mammoth, Older Brother

«I am Agatha, and I am already in school. But for my older brother Gosha, who is fourteen, I am small and foolish. Sometimes, when Gosha is in a good mood, he calls me Agathencia. But you can't count on Gosha being in a good mood! And then I decided to take care of his upbringing while there's still time, and even came up with a whole plan. At the same time, I decided to reform the wild classmate who calls himself Mammoth, pretends to be a zombie, and chews on erasers. Everything went wrong from the very beginning. But I found something very important. At the very heart».