Guess I'm a bit late to the party but still. Was Sachi Asano's self insert or something?
I mean Sachi was the narrator, she pretty much looks like Asano and he has that gender change thing going on. It feels like he rewrote a story about someone and thought that as a girl he could've done more. Maybe I'm completely off the hook though.
There tends to be a little of Asano in each of his story and at least one of his characters, but Sachi was very obviously his blatant self-insert here. She even looks like her, physically.
I didn't even really think about it until she was revealed to be the narrator and I saw her with the short hair but yeah a mangaka who's close to the main character just because, not the hardest to notice.