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.