I like it. The only way that any advanced sexual relationship works is communication. You don't have mind-blowingly, disgustingly lewd, and slimy sex and then just grunt and nod your way through the rest of your life. This is the story of an internal struggle of self, laid bare. And like any good piece of art, your story is layered greatly. The thematic license driving Edwin's internal rationalizations is borrowed by others to be chopped and stripped in order for him to grow. We get to see what that means to these people as they interact with him.
My game saves are broken (again but it's fine, variables are weird) so I've been rereading as I slam the spacebar through, and I've noticed so many small details I didn't know about Mina and Hana. There are so many extra frames in these scenes that show Mina putting things together in her head *without saying anything*.. almost any other dev would just reuse the previous render and just write what Mina was thinking... here, I get to scroll back and forth on my mouse wheel and take in the little differences. Like when Mina realizes that Hana likes rough sex and says sometimes you wanna slap someone during their drinking game at Edwin's birthday, and she reassesses Hana briefly because she's not sure if her hating Ian actually means she's fucking him. Just all the little details in Mina's behavior... Hana being trad af on the inside and so adventurously impulsive otherwise. Her trepidation and worry about falling for a pervert. I love it. All of these things are learned by us through actions and reveals rather than flat, boring, written exposition. It's nearly perfect. It's like listening to a song that has the full sonic range including the unhearable ends of the aural spectrum that a listener knows is missing from CDs and MP3s. You've included those details.
Edwin has to understand others in order to make sense of his mother's sacrifice and how much Ian has become how he used to be. If no one talks about any of this in the novel, no character would ever evolve, and we'd be stuck with a pile of shit that reads like a Warner Bros capeshit script. No thanks.
Besides... half of Edwin's emotional output is internalized into imposter-syndrome-style self analysis, so sthe criticism is a little hyperbolic. It's a valid observation imho, but it seems like something that might not hold up after some rereading for some (maybe?) It may feel like everyone is unrealistically emotional, but that's just because a big chunk of character growth is narrated and internalized by Edwin.. we know what he's saying in his internal dialogue, and the narrator knows as well (it's so perfectly balanced) ... he's not walking around giving Greek soliloquies tho lol
I'm willing to bet that the story has basically been writing itself for you for a while now because it fucking shows and I'm here for it. You struck gold. Keep it up.