is a Japanese manga series written by Tensei Hagiwara and illustrated by Motomu Uehara and Kazuya Arai. It is a spin-off of the main series Kaiji by Nobuyuki Fukumoto. It has been published in Kodansha's Weekly Young Magazine since December 2016. Part of the manga was adapted as segmented episodes within the Mr. Tonegawa: Middle Management Blues anime series. A drama CD based on the series was included on the second DVD/Blu-ray Disc release of the series in March 2019. Story The story follows Ōtsuki, the foreman of Squad E in the underground forced labor camp for people in debt, as he uses one-day outside passes to leave the camp for a day. Usually, each trip involves food or drink in some way. Characters Main characters The foreman of Squad E in the underground labor facility. While it is unknown where he is from, he speaks with a mixture of Kansai, Chūgoku and Shikoku dialects. He is a cunning individual who uses the privilege of being a foreman to profit from selling beer, sweets, and other goods, as well as a series of big cheating victories in the underground cee-lo games he hosts, and accumulates large amounts of perica (a currency that is only used underground) that he has taken from the prisoners. He frequently purchases "One-Day Outside Passes", a work incentive option, with the perica he earns. Though he is a skilled craftsman who can enjoy a day out without a care in the world using his accumulated experience and skills, he does not seem to want to permanently escape from the underground. He is portrayed as quite the gourmet in the story, and most of his outings are spent eating and sometimes going to public baths, exercise and short trips for refreshment. While he knows a number of good restaurants, he is cautious about choosing new places and menus to avoid getting a bad deal and having that regret linger for days, so he draws on his own observations and experiences in the areas he visits for the first time. When the mood is just right, he goes out for a drink at side street bars and enjoys socializing with strangers. Although his age is not specified, he explains that he was a college student in Tokyo 25 years prior (he lived a poor, simple life while working hard in a student band, and his favorite Chinese food