I like this slightly messed-up premise way better than premises where the System / Admin is trying to coerce the main character towards falling in love with the lead. Fight the system with the power of lesbian!
Just when Yvonne was deciding to form a long-term stable relationship with Elsa, even more than as roommates, things go bad... This chapter may not be as ridiculous as a full-on interrupted confession, but it's gut-wrenching seeing Yvonne go from taking a huge step in the ambiguous relationship to Yvonne being forced to be cruel to Elsa. The next few chapters will hurt a bit.
We know Elsa can see Yvonnes expressions and freezing up, but I still find it a bit amazing that she rarely fears Yvonne's mood swings and keeps trying to satisfy (or rescue?) her girl. It'll be really underwhelming if Elsa doesn't eventually reveal a solid running interpretation of Yvonne's reactions to the System pop-ups beyond being concerned for 30 seconds.