Synopsis: Amakusa 1637

A group of friends on a school cruise find themselves transported back to the year 1636, a time when history recalls the Shimabara Revolt of 1637. The revolt was led by a young, charismatic Christian named Amakusa Shirou, which resulted in the death of 3,000 people. While exploring the village they find themselves in, Hayumi Natsuki is mistaken for Amakusa Shirou by the locals, despite the fact that the real leader was a male who had died a year prior. As time goes on, Hayumi gains notoriety as a divine angel, earning the nickname "Shirou" as the people believe she is the predicted savior of 25 years prior.