Lil theory down below~ Will contain spoilers!
I have to say, I was confused at what was going on due to the progression of the plot and translation. But I stuck around and explored a bit more until I roughly have an idea on what the story is actually happening here.
But I just want to say that I absolutely adore the visuals and choice of design, it was so aesthetically pleasing while also curious over what's happening. And while it was confusing, I found myself interested over the story that was being shown and what it could mean.
But aside from the wonky pacing, writing, and translation, this was such an interesting story and I just love how the visuals compliment one another and the music seemed to fit the mood. My only complaint is to make it a bit more coherent but aside from that, it was a great bittersweet story.
Now, theory time~!
Just like the visual novel stated, the plot is set in a time loop, I think the transition of the TV showing static an dthe black and white background with a frustrated Liotte shows that with the amount of times Liotte has been looping the day, it became burned into MC's mind the longer this happened that they can remember vague words, emotions towards Liotte, and even scenes. The reason why Liotte is continuously looping the day is most likely because he either lost his MC in his original world before going mad with grief over losing MC that he searched for ways to bring them back, eventually leading to a fateful meeting with Ivan who might be the "Nevi" that was told during the script in the investigation sequence.
If not Nevi, then he most likely is a God who handles nevi then because of how he acts and his general attitude towards MC saying they have no choice and how he meddles. He probably enjoys Liotte suffering which is why he'll tamper with MC's mind and will (such as the scene where Liotte asks if he and MC could meet up face to face and if you choose the "Yes" option, you won't be able to with a background mocking and commanding you). Another thing I think of is happening is that either this MC is another version of MC in a different universe or something else, and they are trapped in an illusion handled mostly by Ivan because both MC and Liotte (him especially) have no actual free will and can only abide to whatever rules Ivan has.
Why I think this is true is in the Good Ending where the last CG shows the sky glitching out and the title "Reality?" showing that the world MC is in, isn't real and is just an endless loop unless MC themselves breaks it with their decision to stay with Liotte, or either abandon Liotte by taking Ivan's hand and leaving him in the loop world as shown in Bad Ending 1.
I most certainly think that Ivan is pulling the strings and MC is just an unknown part of this entire thing, held their against their knowledge, and Liotte is desperately trying to bring back MC (his lover) back even if it means restarting the entire loop so that they can fall in love with him or rely on him a lot more. Makes the Good Ending bittersweet because they've lived practically majority of their life in that loop and now no idea what will happen to them beyond that.