For one I like that you can pursue Felix. I Find that he is well written, meaning that I am not instantly put off by his behavior. In a lot of games, corruption games with female LI, none of the guys usually inspire me to have the MC interested in them. Like those are pushy jerks that do not deserve to get some pussy.
I personally like my relationship to be more positive. I feel like Summer can be herself with him with out judgement, at least up to this point. That is kind of important to me. Games with female lead that can go in that direction, if the player choose so, are rare. At least as far as my experience go.
Also I know I am far from being in the majority but when I play female led games I like it when they can be bi so right now this is right down my alley.
On a more critical side, the fact that you can't click on the phone screen to make the discutions go forward caught me off guard when I first encountered it. Also it pains me to say because there was visibly a lot of thought put into the UI but it gets in the way for the naughtier sprites and scenes. So either make the UI fully opaque and push the renders and sprite up a bit or allow for a transparent text bubble to make the UI as unintrusive as possible.