Why are the endings titled the way they are, with the happy way ending in her mentally broken, one ending where she marries Defect Mogeko titled bad end(?)? Because this is being retold by King mogeko! (Except for the normal ending, where he is killed. Well, ALL the Mogeko look alike...)
Bad End 0 is titled "Everlasting Dream", and though it's implied that Yonaka was gang-raped to death, it's possible that she was just knocked out or left too exhausted to move. Knowing how the Mogeko operate, her future after thathas only one possibility.
It's bad enough that bad end 7 results in Yonaka getting brutally stabbed to death by her brother, but looking at how he is positioned between her legs, the implications are… more than a little unsettling.
The Elopement "bad end". Why are Yonaka's eyes lifeless and empty?
Because she's a human high school girl who's chosen to remain stranded in a Mogeko's world. And the number of truly trustworthy Mogekos she's met total less than 20. Yes, it'll be a happy elopement… but she and Defect Mogeko are going to be living their lives in hiding from the world at large for a very long time indeed. That's probably going to wear on a person…
Unlike every other bookshelf in the game, Moge-ko's don't contain any porn, just scary books full of gruesome images. Then you realize, that's probably what she gets off to.
Yonaka has a grip strength of 70, meaning that at least in terms of her hands, she's physically stronger with her grip by over two times the norm of her gender and age set. Not only does this make her deadliness with the Knife plausible (if not adding ambiguity as to why she's that strong in the first place), but it makes one wonder just what the hell is wrong with the Kurai family if both children have the mental and physical capacity for being murderers.
From her bus ride that mysteriously drops her off at the Mogeko Castle, to a bus ride that takes her back home, it's heavily ambiguous as to whether or not the story was All Just a Dream — until Yonaka notices she has blood on her hands, and comes face to face with her murderous brother, with the implication that she always knew something was wrong with him but only remembered the good parts. It's not helped by the fact that depending on the ending (ie: the normal and potentially canon one), she's not really surprised or even shocked at the deaths of her parents. If one continues to subscribe to the idea that the majority of the game was a dream, this means the entire Mogeko Castle scenario could've been a bit of a psychosis, a mix of former memories, past traumas, and violent reactions. Which raises questions about what the hell Yonaka's gone through at either her brother's hands, or even her parents, that something as warped as the castle could become such a large-scale delusion that being particularly murderous has her staying in it.
And, further adding fridge horror to the idea, is Yonaka imagining the blood on herself — or did she kill someone or even multiple people in her psychosis on the way back home, as if preparing for the inevitable confrontation with her brother?
The "Happy" ending reveals that King mogeko is still haunting a drugged-up and traumatized Yonaka, who is seemingly unresponsive. Keep in mind Mogekos are sexually attracted to high school girls to the point where one Mogeko considers necrophilia. What's preventing him from doing much, much worse than what we see…? The most likely answer? Absolutelynothing.
