Okura: Cold Case Investigation

Nishina Shiho, is a young mother and raises her child while working as a writer at home. Although she enjoys her life and has a perfect husband, she is troubled by her lack of sex with her husband, Kosuke, who has ED. Due to this, Kosuke suggests that they attend a "couple exchange party", where couples change their partners for various reasons.

After moving in with her older sister Saho, Nagisa runs into her first love Yo (short for Yosuke) at work. Saho invites Nagisa to dinner to meet her fiancé, who turns out to be Yosuke.

With her gloomy demeanor, Sawako has a hard time fitting in. But when an outgoing classmate approaches her, life takes a turn for the better.

Sakura is a scruffy bunny who wants to learn about the outside world, so she leaves Hana's house, where she was kept as a pet and comes to a house where humans and Bosamaru live together.

Kotaro Fuda, a young lawyer running his late father's law firm, meets Tatsumi Tendo, a shogi player with the uncanny ability to predict trial outcomes. Despite Tatsumi's lack of legal experience, Kotaro hires her as a trial lawyer, setting the stage for an unconventional partnership.