Satisfied with his investigation of Lala Lai Theatrical Company, Aquamarine Aqua Hoshino shifts his focus from revenge to career growth and becomes a regular on the variety show Dig Deep! Chase the Impawsible. With memories of his mother still lingering in his mind, Aqua cuts contact with Kana Arima, leaving her unable to enjoy the surging popularity of her idol group, B-Komachi. Meanwhile, following the bone-chilling discovery during B-Komachi's recent music video shoot, Aqua's sister, Ruby, resolves to solve the murders of those dearest to her. With the help of another soul still weighed down by Ai Hoshino's untimely demise, Ruby rises through the ranks, using any means necessary to get her way.

Yotarou is a former yakuza member fresh out of prison and fixated on just one thing: rather than return to a life of crime, the young man aspires to take to the stage of rakugo, a traditional Japanese form of comedic storytelling. Inspired during his incarceration by the performance of distinguished practitioner Yakumo Yuurakutei, he sets his mind on meeting the man who changed his life. After hearing Yotarou's desperate appeal for his mentorship, Yakumo is left with no choice but to accept his very first apprentice. As he eagerly begins his training, Yotarou meets Konatsu, an abrasive young woman who has been under Yakumo's care ever since her beloved father Sukeroku Yuurakutei, another prolific rakugo performer, passed away. Through her hidden passion, Yotarou is drawn to Sukeroku's unique style of rakugo despite learning under contrasting techniques. Upon seeing this, old memories and feelings return to Yakumo who reminisces about a much earlier time when he made a promise with his greatest rival. Shouwa Genroku Rakugo Shinjuu is a story set in both the past and present, depicting the art of rakugo, the relationships it creates, and the lives and hearts of those dedicated to keeping the unique form of storytelling alive.

With her late grandfather's inspiring words in mind, Chizuru Mizuhara teams up with her friend Kazuya Kinoshita to launch a crowdfunding campaign for an amateur film. The two hope that with the success of the project, Chizuru can honor her grandparents' wishes before she loses her grandmother as well. After their wild encounters with three girls—Kazuya's clingy trial girlfriend, Ruka Sarashina; their nosy new next-door neighbor, Mini Yaemori; and Chizuru's shy work friend, Sumi Sakurasawa—they all collaborate together to reach the campaign goal and begin production of the film. As their ambitious endeavor progresses, Chizuru and Kazuya grow closer and begin to struggle with their mutual feelings.

In the studio of the morning childrens' show Together with Mama, a crew of miserable adults prepares their facades of amicable smiles and cheerful exteriors to educate a group of innocent preschoolers. In the middle of it stands Uramichi Omota, a former gymnast who can't help but bring the kids down to earth by revealing the harsh and depressing reality of adulthood, even in front of the rolling cameras. Behind the scenes, Uramichi's much-desired peace is disturbed by his two bothersome juniors who work as the show's rabbit and bear mascots and singers: Utano Tadano, a woman who only wishes to get married; and Iketeru Daga, a handsome man with a crass sense of humor. From smoking and exercising to nihilistic outbursts, everyone's big brother Uramichi always brings up the not-so-moral side to his life lessons.