Izumi, Miki, and Risa invite Hayate and Nagi to their school club which Hayate uses as a way for Nagi to socialize.
are that day with the whole fuss 
about Miss Katsura possibly quitting
son el día que se armó el revuelo 
porque Katsura-sensei iba a renunciar
Foi quando aconteceu aquela bagunça
sobre a Katsura-sensei deixar de dar aulas,