Maid Café Hyakkaou is the first bonus chapter of Volume One of Kakegurui written by Homura Kawamoto and illustrated by Toru Naomura.
Summary[]
Yumeko Jabami and Mary Saotome need money to pay off their debt, so they decide to work at the school Maid Café. Ryota Suzui decides to visit the café one day.
Plot[]
Ryota Suzui had heard that a Maid Café opened and in the school, and decides to visit it. He is excited, because it's his first Maid Café. He is astounded to find Yumeko Jabami working there. She says that she works part-time, and Ryota doesn't think she can save up 310 million yen with her part-time job. Yumeko hands him a menu with the options of Russian Fried-Octopus, Russian Omelette Rice, and Russian Sandwich. Ryota asks her why 'Russian' is attached to everything, and she says that it's the shop gimmick. Ryota orders a Russian Coffee (800 yen), which is described as 'A high-class coffee that uses the highest quality coffee beans. Only one cup has something strange in it.' Ryota asks if he has to drink it, and Yumeko says yes, and tells him to take a big gulp. Ryota happens to get the one coffee with something in it, and Yumeko is holding a bottle of ink.
Part 2[]
Another day, Ryota comes back to the café to find Mary Saotome working there. She anxiously tells him that this isn't a hobby for her, and she only works there because the pay is good. Mary proceeds to throw him the menu, which is a different menu. Ryota asks what the 'Super-Cute Power Injection' is, to which she pushes him down and tells him not to get too cocky.