Prehistory.
The action takes place during the 5th season of Sailor Moon, when Mamoru, Usagi's boyfriend, leaves for the United States to study. Usagi is bored, and at the same time, our heroines are in high school, where Usagi suffers from difficult studies.
On the way home, they stumble upon a strange situation, from where the action begins.
FullHD version on patreon.com/doujinvideo

P.S. Sorry if my translation into languages is a little wrong ... :)

This year 30th anniversary of Sailor Moon, so I want to pay attention to my favorite childhood story, which for some reason creators is ignored.