Act 1:Sailor Moon and Sailor Star

Serena is Usagi's older twin sister who goes to the same school as her. She has higher grades than Usagi and she is the legendary guardian who is known as Sailor Star.

What if Tuxedo Mask didn't fall in love with Usagi? What if Usagi wasn't Chibiusa's future mom? What if Usagi wasn't Princess Serenity? this all leads to the answers.