A watch drops Rin Tsuchimi, Nerine, Mayumi Thyme and Itsuki Midoriba into the past, where the demon king Forbesii is still a young man with no wife and no daughter. Nerine begins to change while they are there, the first sign that four visitors from the future are quietly rewriting the years that made her. Getting home means putting history back the way they found it. This manga adapts Tick! Tack!, Navel's follow-up to Shuffle!, and carries that cast over intact.