Based on analysis of top-grossing romance-driven login systems:
Consider the "romance arc" as a login reward. In games like Mass Effect or Persona 5 , the romance isn't a side quest; it is the narrative anchor. You log in not to save the galaxy, but to see if you can finally have dinner with Tali in the engine room. You log in to hear Thane’s whispered prayers. The shooting and looting are secondary.
