Rintaro keeps the time travels in the hope of saving Mayuri, and the only way to do so is to cancel all the changes that the D-mails have caused one by one... Heavy sacrifices will be necessary, but it is necessary to get the IBN 5100 back to erase the information collected by the SERN, then return to the original time line, the one where the tele-microwave was not used as a time machine...