Hello! The yellow hearts are romance, too, just a more inarticulate way of expressing affection. I have a description of the hearts on the game page. The choices weren’t as well executed as I would have liked, this being my first IF. I’ll fine tune the system on my next project.
And no, no poly routes. But the game is on the short side so you can replay and do both Robin and Ferret’s routes. 😁