Gintoki is participating in the My Wife World Tournament so he can cure Shinpachi of his addiction to the romance simulation game Love Choris.  The tournament involves in-game dates with the heroines.  In the Momo group, Shinpachi uses a passive approach to dominate the other players!
That's what happens when 
bystanders are zero,
¡Eso sucede cuando los espectadores son cero,
É isso o que acontece quando 
há zero transeuntes,