Keiko Aizawa

After receiving a package from his grandfather, Ray, a young inventor who lives in England during the mid-19th century, finds himself caught in the middle of a deadly conflict related to a revolutionary advance in steam power.

When 17-year-old Makoto Konno gains the ability to, quite literally, "leap" backwards through time, she immediately sets about improving her grades and preventing personal mishaps. However, she soon realises that changing the past isn't as simple as it seems, and eventually, will have to rely on her new powers to shape the future of herself and her friends.