Boring Girl is the second chapter of Kakegurui written by Homura Kawamoto and illustrated by Toru Naomura.
On the next school day, Yumeko greets Suzui where Suzui says Yumeko's name in a formal way. She tells him that calling her "Yumeko" is fine. Still with his thoughts about Yumeko not being ordinary, he then thanks her for paying the 5 million yen and tells her that he will pay her back, but she tells him that it is a present and that he shouldn't be worried about it. Once in the classroom, Suzui is shocked seeing Mary's desk being vandalised. Yumeko, worried, asked Saotome what's wrong, which Saotome responds telling Yumeko to shut up and that it happened because she lost to her. She apologises to Saotome, to which Saotome says to herself that she has to make the money somehow.
Suzui asks Yumeko to come with him to the cafetaria and tells her about the tradition of the school. Yumeko becomes elated saying that it is really better than the rumors she has heard of and that she glad that she transferred to the school. Yumeko asks Suzui which gamble is popular at school, if the original games at the school are the main and how the money recuperation works. She as well noticed that ones can bet on other things than money and to what extend they are betting and if the grades at school are influenced by gambling. Suzui is shocked that Yumeko has no fear about the tradition of this school.
Yumeko then asks about the pet structure and noticed that Suzui doesn't have a tag anymore. Suzui explains that if you pay 1 million yen as a "special donation" the tag will be removed. Thanks to her he could pay for it which in turn Yumeko congratulates him. He further explains about the school that if the one has money is justice. They hear a group cheering, were they look at a table in the school cafeteria seeing a girl surrounded by a crowd playing against someone. There, Suzui says that the girl at the table is the rich representative, a first year student named Itsuki Sumeragi, saying that she paid a huge donation and became a member of the student council. He also informs Yumeko that Sumeragi is the daughter of Japan's most prominent toy maker, stating that she is very rich and good at gambling as she never lost a game of Trump. Yumeko is interested in playing with Sumeragi, but Suzui is telling Yumeko that there is a strange rumor about her.
Then, Sumeragi appears in front of Yumeko and asking her to gamble with her. Sumeragi tells Yumeko that she became the eye of the hurricane after defeating Saotome in her own game on her first day at school. After Yumeko asks for her name, the two start to gamble much to Ryota's chagrin. Sumeragi announced that they will play the game Double Concentration.
Sumeragi bets 20 million yen, twice as much as Saotome did in the previous match. Due to Yumeko not having the money to bet, Sumeragi loans her the amount to allow her to play. It turned out the 20 million for Sumeragi is nothing and playing with Yumeko is good for promoting her company's cards. After a brief advertising of the cards, the gamble gets under way. Yumeko gets the first pair with Sumeragi finding a pair herself soon after. It then becomes pair collecting spree by both girls with the surrounding students in awe at their memory skills.