Chang obviously doesn't work for the straight MC. You make a good point with Dalia, but I think the difference there is that the relationship wasn't maintained over time. Annie's the best friend, who's also been crushing on MC (and he on her) for the past eight years; Dalia's the childhood friend that he meets again after a long time and things heat up. I guess both are "friends to lovers," but Annie feels much more than way than Dalia. Obviously YMMV; this is entirely subjective. And as I haven't finished 0.8 yet, there could be dialogue from MC and/or Dalia that I haven't seen yet that might change my perception of their relationship.
But I still wonder if we're going to see an Annie/Dalia threesome--Annie seems quite taken with Dalia's ass. We've been told that every girl gets a threesome, and I think we have very strong reason to believe that Annie will have a threesome not with Dalia (and, for that matter, that Dalia will have a threesome not with Annie), but I guess there could be more than one...
But I still wonder if we're going to see an Annie/Dalia threesome--Annie seems quite taken with Dalia's ass. We've been told that every girl gets a threesome, and I think we have very strong reason to believe that Annie will have a threesome not with Dalia (and, for that matter, that Dalia will have a threesome not with Annie), but I guess there could be more than one...