Atsumi has sent Atsushi to the library to finish his summer homework.  Saya is also at there and the misunderstandings continue.
Oops, I've got some plans 
now, so I have to go.
Ya me voy porque tengo una cita ahora.
Ah, yo tengo que marcharme ya.
Que pena, tenho um 
compromisso agora, então devo ir.