Furuta Arata will play Inuzaki Kazuhisa who is the most powerful figure in the city council and has strong links to the political world due to his long tenure as a city councilor. However, he doesn't control the city council openly and prefers to manipulate the people of his faction from the sidelines. At first, he doesn't think much about Tomoko but slowly changes his opinion of her.
Maeda Atsuko and Chiba Yuudai will be playing city councilors who enters the council at the same time as Tomoko and Toudou. Maeda plays Koide Mia who used to be a gravure idol and stands for election at the recommendation of Inuzaki. Being a former idol, she is good at using SNS to interact with her voters and supporters. On the other hand, Chiba who plays Okamoto Ryo, aspires to return to his past glamourous life which was interrupted when his father ran away due to his debts. As such, Okamoto tries his best to brush up his political knowledge and is always frustrated at Tomoko who is clearly not as knowledgeable as him.
Yo Kimiko plays Kawaharada Akiko who is the city mayor known for her clean image and strong debating powers which she picked up when she was in the US. Being a favourite among the female voters, she is at loggerheads with Inuzaki as she tries to fight against the old power in the council.
Last but not least, Tanaka Kei plays Tomoko's husband Kouhei who fell in love with her at first sight. He is very gentle and considerate to the extreme and takes care of their child while Tomoko stands for election.