Yukiji is in a strange mood and the group soon discover why when they find a resignation letter in her bag.
Mm, Miss Katsura's lectures always 
did move along at a good clip.
Las clases de Katsura-sensei 
siempre van a buen ritmo.
Hm, as aulas da  Katsura-sensei
sempre tiveram um ótimo ritmo.