Yamada Ryu, a second year student who attends the prestigious Suzaku Private High School, is a problem child who comes to school late and leaves early, is prone to fighting all over the place, and even nods off in class. One day, he falls down the stairs with the honor student Shiraishi Urara. They faint, and when he wakes up in the infirmary he's turned into her!
Man, today was seriously the worst day ever!
Meine Fresse, heute war echt
der schlimmste Tag meines Lebens!
¡Demonios, hoy fue el peor día de mi vida!
¡Madre mía, hoy ha sido 
el peor día de mi vida!
En tout cas,
Diamine, questo è stato
 il peggior giorno della mia vita!
Cara, hoje foi o pior dia da minha vida!
Блин, сегодня самый
отстойный день в жизни!