Kazuma was initially disqualified along with other 13 people who chose the same butter as him (i.e.: butter C, revealed to be margarine) by Kuroyanagi, however Kazuma was re-admitted into the Newcomers' battle after Kuroyanagi tasted his butter rolls. This episode also introduces Mizuno Azusagawa, Tsukino's younger and bratty sister, along with the animosity between the two sisters. Near the end, after Kazuma and Kyosuke learned about the issue between the Azusagawa sisters from their manager, they decided to give their best to win the Newcomers' battle to support Tsukino. Mizuno also sets up a gamble in which if Kazuma loses to her, he will have to transfer to Mizuno's new Tokyo Pantasia branch, however should Kazuma wins, Mizuno has to begin respecting Tsukino as her older sister. (thetvdb.com)