A Mysterious Masked Duelist is trying to save his future time by destroying Maximillion Pegasus, because he is the creator of Duel Monsters card, he is certain that the world will be a better place without them. But three Strongest Duelist of three Different Era and Time don't think so, they come together to stop this mad man and saving Duel Monsters. - Yugi/ Yami, Luna and Yusei -

Sawada Yuki Luna is the older sister of Sawada Toko Miki. Luna is an not all special person, being called 'Dame-Luna' at school, she is both verbally and physically bullied by her younger twin and others everyday. Miki is a special person by being the Next Vongola Decimo, Reborn comes to train her. But Luna has a hidden secret of her life and powers. Will be hidden or shown?