The Iwatobi Swim Club needs one more member before it can participate in relays.  Nagisa has set his sights on his classmate Rei, who is a member of the track team.  Despite Rei's refusal to join, but Nagisa appears intent on recruiting Rei into the swim club.
What? Really?!
Was? Wirklich?!
¡¿De veras?!
¿En serio?
Hein ? Vraiment ?
Eh? Davvero?!
O quê? Sério?!
А? Правда?!