It kind of felt like, to me at least, there will be some drama in their relationship. That something might not work. For Maya being with a guy is a new thing and it's not starting on all that great of a note. And Josy seems to be torn between the two but leaning more to being with Maya. And at the same time she got hurt by Maya, now they are sort of back together but there is also a guy in between them. A guy important enough that Maya seems to have fallen for him. So now Josy is confused and is unsure of everything. I kind of feel like that she might realize that she is not happy with sharing someone she loves with someone else.
there are essentially two reasons that make me think it might be like this.
the first is "of an economic nature": DPC must in any case write the break between the two in the "friends only" route, if the couple does not break there could not be only Mc's route with one of the two, and it will most likely be a dramatic moment (in reality there are also couples who break up in a serene way, but it would be a missed opportunity). once the scene has been made it is cheaper to use it for the other path as well, the reasons would be valid anyway.
the other reason is plot: between the problem of free tuition, the looming danger of Maya's father, without a large participation of MC the couple I don't see how it can last, if they went on peacefully it would be really uninteresting, at that point they would just disappear from the main plot
I also believe that a happy ending for Maya and Josy could be there, but essentially as a negative ending for MC in case he gets into trouble with the two girls.