My Name is Kousaka Kyousuke, But I Don't Want to Be Pushed Down by My Sister

[8 years old] Brother! I don’t like this toy, change it! [9 years old] Brother! I don’t like this schoolbag, change it! [11 years old] Brother! I don’t like these sneakers, change it! [14 years old] Brother! I don’t like this school, change it! [18 years old] Brother! I don’t like this sister-in-law, change it! [20 years old] Brother! I don’t like this posture, change it! Old books: A Certain Unscientific Gentleman’s Manual, Infinite Death New book: Life in Another World Starting from the Nightmare Custom Shop