Ojou-sama, Kekkai Sunzen! - Oneshot

[OliveOilOilOil]

Why is she not riding the green car or finding a toilet on the train? Of all the lines she has to be on the Keihin–Tohoku Line

 

[darkhawk196]

Man, as someone whose stomachs easily get upset, this hits close to home.

 

[ReaperCreeper]

I see I correctly guessed the premise when I saw the 決壊 in the title.