I don't know if it's planned, but it would be nice if Erym's boyfriend came back. If I want a game in which my partner is Erym, I need to know that she loves the mc not only because her boyfriend's thing went wrong (I seem to remember that they even had serious plans), but because she really loves the mc over her ex-boyfriend. And the way to make that clear is for the ex-boyfriend to come back. or so i think
Erynn loves MC for real, this can be understood by a little interaction with her if will you follow her route, when, for example, she kisses you in bed (and says that you are the only guy who can sleep in the same bed with her) or asks if he would run away from her if she ran after him. And the reason why she has another boyfriend is just the MC himself, he's to blame for everything, if he hadn't left, he would have been in his place, because she decided to move on, he left, doesn't answer letters and calls, and what should she do, wait for him all her life? She also answered the question why she went to the prom with him because MC wasn't around. And don't lose sight of the fact that 5 years have passed since MC left, but she constantly asks her mom about him. She is genuinely happy when she meets him for the first time after 5 years, and when MC leaves, she could just stay at the bar, but no, she runs after him in heels. There are still plenty of such examples, but it is already obvious that Erynn sincerely loves him.
I really like Erynn, she and MC have their own history, and I like their chemistry, so I'm really looking forward to making progress in their relationship.