1977, the "Crazy Horse" runaway tribe was created This strongest team, called invincible, later changed its name to "Japan-Korea Union" and became a coalition of nearly 500 people in total

High schoolers Mitsuha and Taki are complete strangers living separate lives. But one night, they suddenly switch places. Mitsuha wakes up in Taki’s body, and he in hers. This bizarre occurrence continues to happen randomly, and the two must adjust their lives around each other.