Is it true that there is no story roadmap or something like a complete story draft and only ICSTOR designs and scripts the story except dialogues?
I am sure, it would be much easier to him to finish the game if he just had outsourced the story design and scripting to his writer since the development start. He definitley can afford to pay the writer more.
There is no roadmap to the game, the only one that exists is in ICSTOR's head and he's confirmed this as did his writer, which is why he used to do a poll to see what girl Patreon's wanted to see next since he has an idea for them and he stitches it together in the main story.
He can get away with this since the way the game is designed, none of the characters really interact with each other except for Caroline interrupting Linda and MC in his room and and Linda scolding Sara in her room. There's no "meet 'x' requirement to get 'y' scene" so the game isn't linear in that sense, you can follow one girl and ignore the rest which is a nice touch.
The only time they are suggested to be together is the Harem path but that's not implemented yet which is also when the game opens up and the characters will cross paths as they discover they've all had secret interactions with MC and Linda is kind of the one that is suggesting MC should explore this path (or she wouldn't mind, she enjoys the tease).
I think the main game is pretty much set out and his writer has a good idea too but I feel like he feels each update is underwhelming, who know...maybe v1.0 will surprise us all and he does double the games length worth in this one update to seal the whole thing. I am not betting on it but it would be a nice surprise.