It is an adaptation; they just haven't properly tagged this series. The novel is called the Rebellion Begins or やがて始まるリベリオン .
Here's the authors announcement as proof: https://kakuyomu.jp/users/tsuka7226/news/16818093091911749260
This is missing the adaptation tag. It's a comic adaptation of 【完結】やがて始まるリベリオン
The novel has a different title but this series was announced as an adaptation by the author
The gradeschooler; a normal gradeschooler would suffer trauma from this for the rest of their days, if a cat was traumatized then it's suffering will only be 15 years.
She reminds of a more mentally stable version of my mom. All As and perfect behavior or it was either no door to my room or sleeping on the porch. There were also regular threats to take everything out of my room except for the mattress.
I remember as a kid I couldn't wrap my mind around measurements in reality but I really liked Minecraft so instead of using feet, I'd convert it into blocks, which is exactly one meter, which is what I used to understand scale.