The episode starts with all of Lala's inventions scattered across a table. Lala is called to help Tearju Lunatique with the copier. Rito and Haruna accidentally change bodies when they catch one of Lala's inventions falling off the table. Momo explains that they have to use each other's bodies for seven hours. After school, Rito in Haruna's body gets splattered with mayonnaise when Haruna in Rito's body steps on a bottle of mayonnaise. The real Haruna has to then give her body a shower. However, the timer countdown finishes during this time, leaving Rito touching Haruna.
Celine finds one of Lala's inventions, but because it seems to be broken, Momo lets her play with it. However, it fires a dart that lets Celine massage Tearju Lunatique, causing problems for her as it makes her feel as if someone is playing with her body. When Rito sees Tearju limping, he thinks she might be ill, so offers to take her to the sickroom. Celine uses the machine to violently caress her on the way, making her fall on top of Rito. Yami sees them and thinks that Rito is being "ecchi" to Tearju, so tries to kill him. The device is later revealed to be an invention to massage yourself. Lala gives it to Honekawa because he has terrible back pain.
El episodio comienza con todos los inventos de Lala esparcidos por una mesa. Lala es llamada para ayudar a Tearju Lunatique con la fotocopiadora. Rito y Haruna accidentalmente cambian de cuerpo cuando descubren que uno de los inventos de Lala se cae de la mesa. Momo explica que tienen que usar el cuerpo del otro durante siete horas. Después de la escuela, el cuerpo de Rito en Haruna se salpica con mayonesa cuando Haruna en el cuerpo de Rito pisa una botella de mayonesa. La verdadera Haruna tiene que darle una ducha a su cuerpo. Sin embargo, la cuenta atrás del temporizador termina durante este tiempo, dejando a Rito tocando a Haruna. Celine encuentra uno de los inventos de Lala, pero debido a que parece estar roto, Momo la deja jugar con él. Sin embargo, dispara un dardo que le permite a Celine masajear a Tearju Lunatique, causándole problemas ya que la hace sentir como si alguien estuviera jugando con su cuerpo.
