Your and My Secret (2005)

Owing to an invention and machine, Akira and Nanako exchange bodies and inhabit one another's bodies and lives now. The machine is destroyed, but Manzou gives them an ultimatum to raise enough money to reassemble a machine in order to reverse the switch and what has happened. While they seem to succeed the money is diverted to pay off other obligations and the two re-engage with their effort pending Manzou's return.