Jigoku Sensei Nube: Gozen 0 Ji Nube Shisu!

(Esta sinopse está em inglês. Ajude a comunidade traduzindo!)

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New student comes to Nube class. His name is Jun and he's a lonely boy who loves clowns very much. His only friend is a Pierre - clown in the mirror. And one night Pierre gives Jun a mask with strange abilities. At that point Jun starts to act strange and lot of accidents occur in the school.