As the creation of their doujinshi enters its peak, Suzuka comes down with high fever. Yuu follows her requests to pick out her underwear, wipe her down, etc., but then she comes at him with an even harder request!
It's considered polite 
to exchange new books.
Es ist Etikette,
neue Bücher auszutauschen.
Se intercambian libros por educación.
Se intercambian obras por educación.
La politesse veut
qu’on s’échange nos livres.
È buona educazione scambiarsi le opere.
É prática comum trocar os livros, né...
Думаю, нам стоит
обменяться новыми работами.