After being told by the Game Master to hit on a certain girl, Yotsuya sneaks into the girls' restroom of an unfamiliar high school and saves Tokitate Yuka from being bullied by her classmates. Tokitate turns out to be the fourth party member. When she's summoned into the other world, Tokitate develops a deep admiration for Shindou, whom she sees as much stronger and prettier than herself.... but Shindou also has a past that she can't tell anyone about.
Do not flush
anything but toilet paper. 
Thank you for your understanding and cooperation.
لا تجر شطفاً
لأيّ شيء عدا أوراق الحمّام رجاءً 
 شكراً على تفهمك وتعاونك
Bitte nur Toilettenpapier herunterspülen.
Danke für Ihr Verständnis und Ihre Kooperation.
Solo tirar papel higiénico, por favor
Solo tirar papel higiénico, por favor
DANS LA CUVETTE.
Grazie per la comprensione e la collaborazione.
Não jogue nada além de papel higiênico.
Agradecemos sua compreensão e cooperação.
Не бросайте в унитаз
ничего, кроме туалетной бумаги. 
Благодарим за понимание и сотрудничество.