Myriad Worlds Rescue System: Magical Girls Never Lose

[Magical girls] + [Infinite Flow] + [multiple heroines] + [System] + [anime spin-offs] + [yuri]

Transmigrate across countless worlds to save magical girls? Fight monsters? Is this for real? Come on, I'd be happy if the magical girls didn't have to save me, and now I'm supposed to save them? What? They'll fall to darkness if I don't save them? Then I, for one, am duty-bound to save magical girls.