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.
Oh, by the way...
Oh, übrigens...
A propósito, quiero pedirte un favor 
como compañeros de aula que somos.
Por cierto, ya que somos compañeros 
de clase, me gustaría pedirte un favor...
Ah, au fait…
Oh, tra l'altro...
Ah, a propósito...
А, между прочим...