Sweet Girl Gurumelo

This is a story about a little girl who is grieving the loss of her best friend.
It's been a long time since then, but no one believes her when she says she lost her friend because a monster ate him.
But that doesn't make sense: She never tells lies. She always gets golden stars from her teacher. In short, she's a good girl.
Or is she? After all, she also has the power of the "malice".

Could you listen to her story, and maybe help her out?