Jigoku Sensei Nube: Gozen 0 Ji Nube Shisu!

地獄先生ぬ～べ～　午前0時ぬ～べ～死す！！

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.