I don't mind so much that the MC is a dick to his landlord, after all, that guy is a dick as well, but I admit it becomes quite painful at times, how much Emma loves the MC and then to go and fuck around behind her back.
I might have to do a playthrough, where I stay completely faithful to her, to alleviate my guilty conscience a bit.
Obviously, her fixation on the MC isn't really healthy, but given her backstory, it is understandable, that she would be really focused on her one true love (from her side at least).
Something like that happens with several other games where the characters are really endearing, and I either try for the harem route or try to play as much content as possible with one playthrough.
I hope there soon comes an option to tell her the truth and keep the relationship, if that is at all planned.