Sailor Moon Eternal Edition 5

The Black Moon has been defeated and the Senshi relax once more, but almost immediately a new threat appears, Calling themselves the Death Busters, they seem to be turning the students of Mugen Academy into monsters. Two new Senshi are on the scene of these manifestations, are they enemies or friends?

Usagi and her friends keep running into two Mugen students whose charm seems almost threatening/ Who exactly are Haruka and Michiru?