After stumbling upon a mysterious book that belonged to her father, Mari Hayase is suddenly transported to the past and a world of adventure. With the help of her best friend, Waka, and some of history's most prominent scientists and inventors, she's on a mission to piece together clues about her missing father's whereabouts. Between meeting historical figures like Benjamin Franklin, Alexander Graham Bell, and Thomas Edison, she'll also learn about the important discoveries that make our world great. As Mari makes her way through the past, she'll uncover unbelievable secrets about her father's research and the strange machine that's unlocked time travel. Will she be able to find her father, or will she find herself entangled in timelines? Language: Japanese Subtitles: English Number of discs: 2