One day, high-school boy Yamada bumps into the beautiful girl Shiraishi on the stairs (literally), and their lips touch as they fall. When they regain their wits, they realize that they have swapped bodies. As time progresses, the two realize that this is not the only mysterious happening in the school.

Mañana es para siempre is a Mexican telenovela that began airing on October 20, 2008 on XEW-TV, also known as Canal de las Estrellas. It is produced by the Televisa television network and is a production of Nicandro Díaz González. It stars Silvia Navarro as "Fernanda Elizalde", Fernando Colunga as "Franco Santoro and Eduardo Juarez" and Lucero as "Bárbara Greco" the main villain of the story. Its was one of the most popular soap operas in the history of Univision, its finale having been watched by over 11 million viewers, faring well against US mainstream shows. It is a remake of the 2007–2008 Colombian telenovela by RCN Pura Sangre, which starred Rafael Novoa, Marcela Mar and Kathy Saenz in the antagonic role.

A lawyer and a prosecutor, whose paths cross with a murder case, will have to work together to find the murderer, and this will create an irreversible breaking point in their lives.

In this world, Sensha-do (戦車道), the art of tank-combat, is a traditional Japanese martial art for girls. Miho, a girl who just transferred into the Ōrai Girls' Academy in Ibaraki Prefecture, has been ordered by the academy's student council chairperson to join the school team and compete in the national Sensha-do championships.

Right after Ryu Sun-jae, a top star, ends his life, Im Sol, his top fan, somehow ends up at a time when they were in high school and tries to protect him. A fantasy romance unfolds where people who missed each other in time finally meet.